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/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation , either version 3 of the License , or
* ( at your option ) any later version .
*
* This program is distributed in the hope that it will be useful ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
* GNU General Public License for more details .
*
* You should have received a copy of the GNU General Public License
* along with this program . If not , see < http : //www.gnu.org/licenses/>.
*
*/
/** BusVoodoo global definitions and methods (code)
* @ file busvoodoo_global . c
* @ author King Kévin < kingkevin @ cuvoodoo . info >
* @ date 2018
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* @ note peripherals used : time @ ref busvoodoo_led_timer
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*/
/* standard libraries */
# include <stdint.h> // standard integer types
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# include <string.h> // string utilities
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# include <math.h> // math utilities
/* STM32 (including CM3) libraries */
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# include <libopencm3/cm3/nvic.h> // interrupt handler
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# include <libopencm3/stm32/gpio.h> // general purpose input output library
# include <libopencm3/stm32/rcc.h> // real-time control clock library
# include <libopencm3/stm32/adc.h> // ADC utilities
# include <libopencm3/stm32/dac.h> // DAC utilities
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# include <libopencm3/stm32/timer.h> // timer utilities
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/* own libraries */
# include "global.h" // board definitions
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# include "menu.h" // command definitions
# include "print.h" // print utilities
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# include "busvoodoo_global.h" // BusVoodoo definitions
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/** @defgroup busvoodoo_led_timer timer used to blink LED
* @ {
*/
# define BUSVOODOO_LED_TIMER 5 /**< timer peripheral */
/** @} */
/** blue LED status */
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static volatile bool busvoodoo_global_led_blue = false ;
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/** red LED status */
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static volatile bool busvoodoo_global_led_red = false ;
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/** existing hardware revisions identifiable with voltages */
static const uint8_t busvoodoo_revision_numbers [ ] = { 27 } ;
/** hardware revision voltages (calculated from divider ratios) */
static const float busvoodoo_revision_voltages [ ] = { 100.0 / ( 10.0 + 100.0 ) * 3.3 } ;
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const char * busvoodoo_global_pinout_io [ 10 ] = { NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL } ;
const char * busvoodoo_global_pinout_rscan [ 5 ] = { NULL , NULL , NULL , NULL , NULL } ;
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const char * busvoodoo_io_names [ 13 ] = { " I2C_SMBA/SPI_NSS/I2S_WS/UART1_CK " , " SDIO_CMD " , " UART1_CTS/SPI_SCK/I2S_CK " , " SDIO_D3/UART2_RX " , " I2C_SDA/UART1_RX " , " SDIO_D0 " , " SPI_MOSI/I2S_SD " , " SDIO_CK " , " I2C_SCL/UART1_TX " , " SDIO_D1 " , " I2S_MCK " , " UART1_RTS/SPI_MISO " , " SDIO_D2/UART2_TX " } ;
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const uint32_t busvoodoo_io_ports [ 13 ] = { GPIOB , GPIOD , GPIOB , GPIOC , GPIOB , GPIOC , GPIOB , GPIOC , GPIOB , GPIOC , GPIOC , GPIOB , GPIOC } ;
const uint32_t busvoodoo_io_pins [ 13 ] = { GPIO12 , GPIO2 , GPIO13 , GPIO11 , GPIO11 , GPIO8 , GPIO15 , GPIO12 , GPIO10 , GPIO9 , GPIO6 , GPIO14 , GPIO10 } ;
const uint8_t busvoodoo_io_groups [ 13 ] = { 6 , 6 , 4 , 4 , 1 , 1 , 5 , 5 , 2 , 2 , 3 , 3 , 3 } ;
bool busvoodoo_full = false ;
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uint8_t busvoodoo_revision = 0 ;
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void busvoodoo_setup ( void )
{
// enable all GPIO domains since we use pins on all ports
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rcc_periph_clock_enable ( RCC_GPIOA ) ; // enable clock for all GPIO domains
rcc_periph_clock_enable ( RCC_GPIOB ) ; // enable clock for all GPIO domains
rcc_periph_clock_enable ( RCC_GPIOC ) ; // enable clock for all GPIO domains
rcc_periph_clock_enable ( RCC_GPIOD ) ; // enable clock for all GPIO domains
rcc_periph_clock_enable ( RCC_AFIO ) ; // enable clock for alternate function (for communication)
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busvoodoo_safe_state ( ) ; // put pins in safe state (for common light version)
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// check if this BusVoodoo is a full version
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rcc_periph_clock_enable ( RCC_ADC12_IN ( BUSVOODOO_HV_CHANNEL ) ) ; // enable clock for GPIO domain for HV channel
gpio_set ( ADC12_IN_PORT ( BUSVOODOO_HV_CHANNEL ) , ADC12_IN_PIN ( BUSVOODOO_HV_CHANNEL ) ) ; // pull ADC HV high
gpio_set_mode ( ADC12_IN_PORT ( BUSVOODOO_HV_CHANNEL ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_PULL_UPDOWN , ADC12_IN_PIN ( BUSVOODOO_HV_CHANNEL ) ) ; // set HV channel as digital input with pull-up capabilities
// on a full version (fully populated board) the ADC HV signal will be pulled low
if ( gpio_get ( ADC12_IN_PORT ( BUSVOODOO_HV_CHANNEL ) , ADC12_IN_PIN ( BUSVOODOO_HV_CHANNEL ) ) ) { // check is ADC HV is pulled low
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busvoodoo_full = false ;
} else {
busvoodoo_full = true ;
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busvoodoo_safe_state ( ) ; // also put the full version pins in safe state
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}
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// setup ADC to measure hardware revision voltage
rcc_periph_clock_enable ( RCC_ADC12_IN ( BUSVOODOO_HW_REV_CHANNEL ) ) ; // enable clock for GPIO domain for hardware revision channel
gpio_set_mode ( ADC12_IN_PORT ( BUSVOODOO_HW_REV_CHANNEL ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , ADC12_IN_PIN ( BUSVOODOO_HW_REV_CHANNEL ) ) ; // set hardware revision channel as analogue input for the ADC
rcc_periph_clock_enable ( RCC_ADC1 ) ; // enable clock for ADC domain
adc_off ( ADC1 ) ; // switch off ADC while configuring it
adc_set_sample_time_on_all_channels ( ADC1 , ADC_SMPR_SMP_28DOT5CYC ) ; // use 28.5 cycles to sample (long enough to be stable)
adc_enable_temperature_sensor ( ADC1 ) ; // enable internal voltage reference
adc_enable_external_trigger_regular ( ADC1 , ADC_CR2_EXTSEL_SWSTART ) ; // use software trigger to start conversion
uint8_t rev_channels [ ] = { ADC_CHANNEL17 , ADC_CHANNEL ( BUSVOODOO_HW_REV_CHANNEL ) } ; // voltages to convert: internal, hardware revision
adc_set_regular_sequence ( ADC1 , LENGTH ( rev_channels ) , rev_channels ) ; // set channels to convert
adc_enable_discontinuous_mode_regular ( ADC1 , LENGTH ( rev_channels ) ) ; // convert all channels
adc_power_on ( ADC1 ) ; // switch on ADC
sleep_us ( 1 ) ; // wait t_stab for the ADC to stabilize
adc_reset_calibration ( ADC1 ) ; // remove previous non-calibration
adc_calibration ( ADC1 ) ; // calibrate ADC for less accuracy errors
adc_start_conversion_regular ( ADC1 ) ; // start conversion to get first voltage
uint16_t channels [ LENGTH ( rev_channels ) ] = { 0 } ; // to store the values measured on the channels
for ( uint8_t channel_i = 0 ; channel_i < LENGTH ( channels ) ; channel_i + + ) { // get all conversions
while ( ! adc_eoc ( ADC1 ) ) ; // wait until conversion finished
channels [ channel_i ] = adc_read_regular ( ADC1 ) ; // read voltage value (clears flag)
}
float revision_voltage = channels [ 1 ] * 1.2 / channels [ 0 ] ; // calculate voltage
// find out revision of the board
gpio_set_mode ( GPIO ( BUSVOODOO_HW_REV_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_PULL_UPDOWN , GPIO ( BUSVOODOO_HW_REV_PIN ) ) ; // use pull up and down to check if a voltage divider is present on the pin
gpio_set ( GPIO ( BUSVOODOO_HW_REV_PORT ) , GPIO ( BUSVOODOO_HW_REV_PIN ) ) ; // pull up
bool rev_up = ( 0 ! = gpio_get ( GPIO ( BUSVOODOO_HW_REV_PORT ) , GPIO ( BUSVOODOO_HW_REV_PIN ) ) ) ; // check if the signal is still up
gpio_clear ( GPIO ( BUSVOODOO_HW_REV_PORT ) , GPIO ( BUSVOODOO_HW_REV_PIN ) ) ; // pull down
bool rev_down = ( 0 = = gpio_get ( GPIO ( BUSVOODOO_HW_REV_PORT ) , GPIO ( BUSVOODOO_HW_REV_PIN ) ) ) ; // check if the signal is still down
gpio_set_mode ( ADC12_IN_PORT ( BUSVOODOO_HW_REV_CHANNEL ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , ADC12_IN_PIN ( BUSVOODOO_HW_REV_CHANNEL ) ) ; // put back to analog input
// get revision
if ( rev_up & & rev_down ) { // no voltage divider on pin
busvoodoo_revision = 18 ; // the pin is floating only for revision 18
} else { // voltage divider on pin
for ( uint8_t i = 0 ; i < LENGTH ( busvoodoo_revision_numbers ) & & i < LENGTH ( busvoodoo_revision_voltages ) ; i + + ) { // go through expected revision voltages
if ( revision_voltage > busvoodoo_revision_voltages [ i ] - 0.2 & & revision_voltage < busvoodoo_revision_voltages [ i ] + 0.2 ) { // verify if voltage matches
busvoodoo_revision = busvoodoo_revision_numbers [ i ] ; // remember revision number for matching voltage
break ; // stop searching
}
}
}
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// setup ADC to measure the 5V, 3.3V, LV, and HV power rails voltages
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rcc_periph_clock_enable ( RCC_ADC12_IN ( BUSVOODOO_5V_CHANNEL ) ) ; // enable clock for GPIO domain for 5V channel
gpio_set_mode ( ADC12_IN_PORT ( BUSVOODOO_5V_CHANNEL ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , ADC12_IN_PIN ( BUSVOODOO_5V_CHANNEL ) ) ; // set 5V channel as analogue input for the ADC
rcc_periph_clock_enable ( RCC_ADC12_IN ( BUSVOODOO_3V3_CHANNEL ) ) ; // enable clock for GPIO domain for 3.3V channel
gpio_set_mode ( ADC12_IN_PORT ( BUSVOODOO_3V3_CHANNEL ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , ADC12_IN_PIN ( BUSVOODOO_3V3_CHANNEL ) ) ; // set 3.3V channel as analogue input for the ADC
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rcc_periph_clock_enable ( RCC_ADC12_IN ( BUSVOODOO_LV_CHANNEL ) ) ; // enable clock for GPIO domain for LV channel
gpio_set_mode ( ADC12_IN_PORT ( BUSVOODOO_LV_CHANNEL ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , ADC12_IN_PIN ( BUSVOODOO_LV_CHANNEL ) ) ; // set LV channel as analogue input for the ADC
rcc_periph_clock_enable ( RCC_ADC12_IN ( BUSVOODOO_HV_CHANNEL ) ) ; // enable clock for GPIO domain for HV channel
gpio_set_mode ( ADC12_IN_PORT ( BUSVOODOO_HV_CHANNEL ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , ADC12_IN_PIN ( BUSVOODOO_HV_CHANNEL ) ) ; // set HV channel as analogue input for the ADC
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rcc_periph_clock_enable ( RCC_ADC12_IN ( BUSVOODOO_HW_REV_CHANNEL ) ) ; // enable clock for GPIO domain for hardware revision channel
gpio_set_mode ( ADC12_IN_PORT ( BUSVOODOO_HW_REV_CHANNEL ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , ADC12_IN_PIN ( BUSVOODOO_HW_REV_CHANNEL ) ) ; // set hardware revision channel as analogue input for the ADC
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rcc_periph_clock_enable ( RCC_ADC1 ) ; // enable clock for ADC domain
adc_off ( ADC1 ) ; // switch off ADC while configuring it
adc_set_sample_time_on_all_channels ( ADC1 , ADC_SMPR_SMP_28DOT5CYC ) ; // use 28.5 cycles to sample (long enough to be stable)
adc_enable_temperature_sensor ( ADC1 ) ; // enable internal voltage reference
adc_enable_external_trigger_regular ( ADC1 , ADC_CR2_EXTSEL_SWSTART ) ; // use software trigger to start conversion
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uint8_t rail_channels [ ] = { ADC_CHANNEL17 , ADC_CHANNEL ( BUSVOODOO_5V_CHANNEL ) , ADC_CHANNEL ( BUSVOODOO_3V3_CHANNEL ) , ADC_CHANNEL ( BUSVOODOO_LV_CHANNEL ) , ADC_CHANNEL ( BUSVOODOO_HV_CHANNEL ) } ; // voltages to convert: internal, 5V, 3.3V, LV, HV
adc_set_regular_sequence ( ADC1 , LENGTH ( rail_channels ) , rail_channels ) ; // set channels to convert
adc_enable_discontinuous_mode_regular ( ADC1 , LENGTH ( rail_channels ) ) ; // convert all channels
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adc_power_on ( ADC1 ) ; // switch on ADC
sleep_us ( 1 ) ; // wait t_stab for the ADC to stabilize
adc_reset_calibration ( ADC1 ) ; // remove previous non-calibration
adc_calibration ( ADC1 ) ; // calibrate ADC for less accuracy errors
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// setup DAC to control LV and HV voltage outputs
gpio_set_mode ( GPIO ( BUSVOODOO_LVCTL_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , GPIO ( BUSVOODOO_LVCTL_PIN ) ) ; // set LV pin as analog (the DAC will use it as output)
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rcc_periph_clock_enable ( RCC_DAC ) ; // enable clock for DAC domain
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dac_disable ( BUSVOODOO_LVCTL_CHANNEL ) ; // disable output to configure it properly
dac_buffer_enable ( BUSVOODOO_LVCTL_CHANNEL ) ; // enable output buffer to be able to drive larger loads (should be per default)
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if ( busvoodoo_full ) {
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gpio_set_mode ( GPIO ( BUSVOODOO_HVCTL_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , GPIO ( BUSVOODOO_HVCTL_PIN ) ) ; // set HV pin as analog (the DAC will use it as output)
dac_disable ( BUSVOODOO_HVCTL_CHANNEL ) ; // disable output to configure it properly
dac_buffer_enable ( BUSVOODOO_HVCTL_CHANNEL ) ; // enable output buffer to be able to drive larger loads (should be per default)
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}
dac_set_trigger_source ( DAC_CR_TSEL1_SW ) ; // use software to trigger the voltage change
dac_set_trigger_source ( DAC_CR_TSEL2_SW ) ; // use software to trigger the voltage change
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// enable timer for LED blinking
rcc_periph_clock_enable ( RCC_TIM ( BUSVOODOO_LED_TIMER ) ) ; // enable clock for timer domain
timer_reset ( TIM ( BUSVOODOO_LED_TIMER ) ) ; // reset timer configuration
timer_set_mode ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_CR1_CKD_CK_INT , TIM_CR1_CMS_EDGE , TIM_CR1_DIR_UP ) ; // configure timer to up counting mode
timer_set_prescaler ( TIM ( BUSVOODOO_LED_TIMER ) , ( rcc_ahb_frequency / 2000 ) - 1 ) ; // set prescaler to have 2kHz ticks (the prescaler is not large enough for 1kHz ticks)
timer_set_period ( TIM ( BUSVOODOO_LED_TIMER ) , 0xffff ) ; // set period to maximum
nvic_enable_irq ( NVIC_TIM_IRQ ( BUSVOODOO_LED_TIMER ) ) ; // enable interrupts for this timer
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}
void busvoodoo_safe_state ( void )
{
// disable voltage outputs
gpio_set ( GPIO ( BUSVOODOO_VOUTEN_PORT ) , GPIO ( BUSVOODOO_VOUTEN_PIN ) ) ; // disable 5V and 3.3V output on connector
gpio_set_mode ( GPIO ( BUSVOODOO_VOUTEN_PORT ) , GPIO_MODE_OUTPUT_2_MHZ , GPIO_CNF_OUTPUT_OPENDRAIN , GPIO ( BUSVOODOO_VOUTEN_PIN ) ) ; // set pin as output (open-drain pulled high to disable the pMOS)
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gpio_clear ( GPIO ( BUSVOODOO_LVEN_PORT ) , GPIO ( BUSVOODOO_LVEN_PIN ) ) ; // disable LV voltage regulator
gpio_set_mode ( GPIO ( BUSVOODOO_LVEN_PORT ) , GPIO_MODE_OUTPUT_2_MHZ , GPIO_CNF_OUTPUT_PUSHPULL , GPIO ( BUSVOODOO_LVEN_PIN ) ) ; // set pin as output (push-pull, pulled low for safety)
gpio_set ( GPIO ( BUSVOODOO_HVEN_PORT ) , GPIO ( BUSVOODOO_HVEN_PIN ) ) ; // disable HV voltage regulator
gpio_set_mode ( GPIO ( BUSVOODOO_HVEN_PORT ) , GPIO_MODE_OUTPUT_2_MHZ , GPIO_CNF_OUTPUT_OPENDRAIN , GPIO ( BUSVOODOO_HVEN_PIN ) ) ; // set pin as output (open-drain pulled high to disable the pMOS)
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// set DAC channel back to analog
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gpio_set_mode ( GPIO ( BUSVOODOO_LVCTL_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , GPIO ( BUSVOODOO_LVCTL_PIN ) ) ; // set LV pin as analog
gpio_set_mode ( GPIO ( BUSVOODOO_HVCTL_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_ANALOG , GPIO ( BUSVOODOO_HVCTL_PIN ) ) ; // set HV pin as analog
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// disable embedded pull-ups
gpio_primary_remap ( AFIO_MAPR_SWJ_CFG_JTAG_OFF_SW_ON , 0 ) ; // disable JTAG (but keep SWD) so to use the underlying GPIOs (PA15, PB3, PB4)
gpio_set ( GPIO ( BUSVOODOO_5VPULLUP_PORT ) , GPIO ( BUSVOODOO_5VPULLUP_PIN ) ) ; // set pin high to disable 5V embedded pull-up
gpio_set_mode ( GPIO ( BUSVOODOO_5VPULLUP_PORT ) , GPIO_MODE_OUTPUT_2_MHZ , GPIO_CNF_OUTPUT_OPENDRAIN , GPIO ( BUSVOODOO_5VPULLUP_PIN ) ) ; // set pin as output (open-drain pulled high to disable the pMOS)
gpio_set ( GPIO ( BUSVOODOO_OEPULLUP_PORT ) , GPIO ( BUSVOODOO_OEPULLUP_PIN ) ) ; // set pin high to disable embedded pull-up bus switch
gpio_set_mode ( GPIO ( BUSVOODOO_OEPULLUP_PORT ) , GPIO_MODE_OUTPUT_2_MHZ , GPIO_CNF_OUTPUT_OPENDRAIN , GPIO ( BUSVOODOO_OEPULLUP_PIN ) ) ; // set pin as output (open-drain pulled high to disable the bus switch)
// disable all signal I/O outputs
for ( uint8_t pin = 0 ; pin < LENGTH ( busvoodoo_io_ports ) & & pin < LENGTH ( busvoodoo_io_pins ) ; pin + + ) {
gpio_set_mode ( busvoodoo_io_ports [ pin ] , GPIO_MODE_INPUT , GPIO_CNF_INPUT_FLOAT , busvoodoo_io_pins [ pin ] ) ; // set pin back to input (floating)
}
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if ( busvoodoo_full ) {
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// disable RS-232 signals
gpio_set_mode ( GPIO ( BUSVOODOO_RS232_TX_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_FLOAT , GPIO ( BUSVOODOO_RS232_TX_PIN ) ) ; // set pin to floating
gpio_set_mode ( GPIO ( BUSVOODOO_RS232_RX_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_FLOAT , GPIO ( BUSVOODOO_RS232_RX_PIN ) ) ; // set pin to floating
gpio_set_mode ( GPIO ( BUSVOODOO_RS232_RTS_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_FLOAT , GPIO ( BUSVOODOO_RS232_RTS_PIN ) ) ; // set pin to floating
gpio_set_mode ( GPIO ( BUSVOODOO_RS232_CTS_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_FLOAT , GPIO ( BUSVOODOO_RS232_CTS_PIN ) ) ; // set pin to floating
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gpio_set ( GPIO ( BUSVOODOO_RS232_EN_PORT ) , GPIO ( BUSVOODOO_RS232_EN_PIN ) ) ; // set high to disable receiver
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gpio_set_mode ( GPIO ( BUSVOODOO_RS232_EN_PORT ) , GPIO_MODE_OUTPUT_2_MHZ , GPIO_CNF_OUTPUT_OPENDRAIN , GPIO ( BUSVOODOO_RS232_EN_PIN ) ) ; // use external pull-up resistor to set high by default
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gpio_clear ( GPIO ( BUSVOODOO_RS232_SHDN_PORT ) , GPIO ( BUSVOODOO_RS232_SHDN_PIN ) ) ; // set low to disable transmitter
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gpio_set_mode ( GPIO ( BUSVOODOO_RS232_SHDN_PORT ) , GPIO_MODE_OUTPUT_2_MHZ , GPIO_CNF_OUTPUT_PUSHPULL , GPIO ( BUSVOODOO_RS232_SHDN_PIN ) ) ; // there is also an external pull-down resistor to disable per default
// disable RS-485 signals (RS and TX are shared with RS-232)
gpio_set ( GPIO ( BUSVOODOO_RS485_RE_PORT ) , GPIO ( BUSVOODOO_RS485_RE_PIN ) ) ; // set high to disable receiver
gpio_set_mode ( GPIO ( BUSVOODOO_RS485_RE_PORT ) , GPIO_MODE_OUTPUT_2_MHZ , GPIO_CNF_OUTPUT_OPENDRAIN , GPIO ( BUSVOODOO_RS485_RE_PIN ) ) ; // use external pull-up resistor to set high by default
gpio_clear ( GPIO ( BUSVOODOO_RS485_DE_PORT ) , GPIO ( BUSVOODOO_RS485_DE_PIN ) ) ; // set low to disable transmitter
gpio_set_mode ( GPIO ( BUSVOODOO_RS485_DE_PORT ) , GPIO_MODE_OUTPUT_2_MHZ , GPIO_CNF_OUTPUT_PUSHPULL , GPIO ( BUSVOODOO_RS485_DE_PIN ) ) ; // there is also an external pull-down resistor to disable per default
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gpio_set_mode ( GPIO ( BUSVOODOO_RS485_TX_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_FLOAT , GPIO ( BUSVOODOO_RS485_TX_PIN ) ) ; // set pin to floating
gpio_set_mode ( GPIO ( BUSVOODOO_RS485_RX_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_FLOAT , GPIO ( BUSVOODOO_RS485_RX_PIN ) ) ; // set pin to floating
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// disable CAN transceiver and signals (put back to input floating)
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gpio_set_mode ( GPIO ( BUSVOODOO_CAN_TX_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_FLOAT , GPIO ( BUSVOODOO_CAN_TX_PIN ) ) ; // set pin to floating
gpio_set_mode ( GPIO ( BUSVOODOO_CAN_RX_PORT ) , GPIO_MODE_INPUT , GPIO_CNF_INPUT_FLOAT , GPIO ( BUSVOODOO_CAN_RX_PIN ) ) ; // set pin to floating
gpio_set ( GPIO ( BUSVOODOO_CAN_EN_PORT ) , GPIO ( BUSVOODOO_CAN_EN_PIN ) ) ; // set high to power off transceiver
gpio_set_mode ( GPIO ( BUSVOODOO_CAN_EN_PORT ) , GPIO_MODE_OUTPUT_2_MHZ , GPIO_CNF_OUTPUT_OPENDRAIN , GPIO ( BUSVOODOO_CAN_EN_PIN ) ) ; // use external pull-up resistor to set high by default
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}
}
bool busvoodoo_vout_switch ( bool on )
{
if ( on ) { // we need to switch on Vout
gpio_clear ( GPIO ( BUSVOODOO_VOUTEN_PORT ) , GPIO ( BUSVOODOO_VOUTEN_PIN ) ) ; // enable Vout
} else {
gpio_set ( GPIO ( BUSVOODOO_VOUTEN_PORT ) , GPIO ( BUSVOODOO_VOUTEN_PIN ) ) ; // disable Vout
}
bool to_return = true ;
sleep_ms ( 1 ) ; // wait a bit for voltage to settle
float voltage = busvoodoo_vreg_get ( BUSVOODOO_5V_CHANNEL ) ; // get 5V power rail voltage
if ( voltage < 4.0 | | voltage > 5.5 ) {
to_return = false ; // voltage output is not ok
}
voltage = busvoodoo_vreg_get ( BUSVOODOO_3V3_CHANNEL ) ; // get 3.3V power rail voltage
if ( voltage < 3.0 | | voltage > 3.6 ) {
to_return = true ; // voltage output is not ok
}
return to_return ;
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}
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float busvoodoo_vreg_get ( uint8_t channel )
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{
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if ( channel ! = BUSVOODOO_5V_CHANNEL & & channel ! = BUSVOODOO_3V3_CHANNEL & & channel ! = BUSVOODOO_LV_CHANNEL & & channel ! = BUSVOODOO_HV_CHANNEL ) { // check channel
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return NAN ;
}
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uint16_t channels [ 5 ] = { 0 } ; // to start converted values: internal reference 1.2V, 5V rail, 3.3V rail, LV rail, HV rail, hardware version
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adc_start_conversion_regular ( ADC1 ) ; // start conversion to get first voltage
for ( uint8_t channel_i = 0 ; channel_i < LENGTH ( channels ) ; channel_i + + ) { // get all conversions
while ( ! adc_eoc ( ADC1 ) ) ; // wait until conversion finished
channels [ channel_i ] = adc_read_regular ( ADC1 ) ; // read voltage value (clears flag)
}
float to_return = NAN ; // voltage to return
switch ( channel ) { // get converter value and calculate according to the voltage divider on this channel
case BUSVOODOO_5V_CHANNEL :
to_return = channels [ 1 ] / ( 10.0 / ( 10.0 + 10.0 ) ) ;
break ;
case BUSVOODOO_3V3_CHANNEL :
to_return = channels [ 2 ] / ( 10.0 / ( 10.0 + 10.0 ) ) ;
break ;
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case BUSVOODOO_LV_CHANNEL :
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to_return = channels [ 3 ] / ( 10.0 / ( 10.0 + 10.0 ) ) ;
break ;
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case BUSVOODOO_HV_CHANNEL :
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to_return = channels [ 4 ] / ( 1.5 / ( 10.0 + 1.5 ) ) ;
break ;
default : // unknown channel
to_return = NAN ;
break ;
}
if ( ! isnan ( to_return ) ) {
to_return * = 1.2 / channels [ 0 ] ; // calculate voltage from converted values using internal 1.2V voltage reference
}
return to_return ;
}
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float busvoodoo_lv_set ( float voltage )
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{
float volt = NAN ; // common variable for voltages
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if ( voltage < = 0.3 ) { // disable voltage regulator
gpio_clear ( GPIO ( BUSVOODOO_LVEN_PORT ) , GPIO ( BUSVOODOO_LVEN_PIN ) ) ; // disable LV voltage regulator
dac_disable ( BUSVOODOO_LVCTL_CHANNEL ) ; // disable LV control
} else { // enable voltage regulator
if ( voltage > 4.85 ) { // use the 5V directly
gpio_clear ( GPIO ( BUSVOODOO_5VPULLUP_PORT ) , GPIO ( BUSVOODOO_5VPULLUP_PIN ) ) ; // put 5V on LV line
} else { // use adjustable voltage regulator (5.0V rail minus LDO and diodes)
gpio_set ( GPIO ( BUSVOODOO_5VPULLUP_PORT ) , GPIO ( BUSVOODOO_5VPULLUP_PIN ) ) ; // disable 5V input
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volt = busvoodoo_vreg_get ( BUSVOODOO_3V3_CHANNEL ) ; // get reference voltage
if ( isnan ( voltage ) ) {
return NAN ;
}
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uint16_t dac_set = BUSVOODOO_LV_SET ( voltage ) / volt * 4095 ; // DAC value corresponding to the voltage
dac_load_data_buffer_single ( dac_set , RIGHT12 , BUSVOODOO_LVCTL_CHANNEL ) ; // set output so the voltage regulator is set to 2.5V
dac_software_trigger ( BUSVOODOO_LVCTL_CHANNEL ) ; // transfer the value to the DAC
dac_enable ( BUSVOODOO_LVCTL_CHANNEL ) ; // enable DAC
gpio_set ( GPIO ( BUSVOODOO_LVEN_PORT ) , GPIO ( BUSVOODOO_LVEN_PIN ) ) ; // enable LV voltage regulator
}
}
sleep_ms ( 10 ) ; // let voltage settle
volt = busvoodoo_vreg_get ( BUSVOODOO_LV_CHANNEL ) ; // get LV voltage to return
return volt ; // return measured voltage
}
float busvoodoo_hv_set ( float voltage )
{
if ( ! busvoodoo_full ) { // the HV voltage regulator is only present on the full version
return NAN ;
}
float volt = NAN ; // common variable for voltages
if ( voltage < 3.29 ) { // disable voltage regulator
gpio_set ( GPIO ( BUSVOODOO_HVEN_PORT ) , GPIO ( BUSVOODOO_HVEN_PIN ) ) ; // disable HV voltage regulator
dac_disable ( BUSVOODOO_HVCTL_CHANNEL ) ; // disable HV control
} else {
if ( voltage > 24.0 ) { // enforce upper voltage limit (diodes limit is 30V, ADC input limit is 25V)
voltage = 24.0 ;
}
volt = busvoodoo_vreg_get ( BUSVOODOO_3V3_CHANNEL ) ; // get reference voltage
if ( isnan ( voltage ) ) {
return NAN ;
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}
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uint16_t dac_set = BUSVOODOO_HV_SET ( voltage ) / volt * 4095 ; // DAC value corresponding to the voltage
dac_load_data_buffer_single ( dac_set , RIGHT12 , BUSVOODOO_HVCTL_CHANNEL ) ; // set output so the voltage regulator is set to desired output voltage
dac_software_trigger ( BUSVOODOO_HVCTL_CHANNEL ) ; // transfer the value to the DAC
dac_enable ( BUSVOODOO_HVCTL_CHANNEL ) ; // enable DAC
gpio_clear ( GPIO ( BUSVOODOO_HVEN_PORT ) , GPIO ( BUSVOODOO_HVEN_PIN ) ) ; // enable HV voltage regulator
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}
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sleep_ms ( 100 ) ; // let the voltage regulator start and voltage settle
volt = busvoodoo_vreg_get ( BUSVOODOO_HV_CHANNEL ) ; // get HV voltage
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return volt ; // return measured voltage
}
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float busvoodoo_embedded_pullup ( bool on )
{
if ( on ) { // enable embedded pull-ups
gpio_clear ( GPIO ( BUSVOODOO_OEPULLUP_PORT ) , GPIO ( BUSVOODOO_OEPULLUP_PIN ) ) ; // switch on embedded pull-ups
} else { // disable embedded pull-ups
gpio_set ( GPIO ( BUSVOODOO_OEPULLUP_PORT ) , GPIO ( BUSVOODOO_OEPULLUP_PIN ) ) ; // switch off embedded pull-up
}
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return busvoodoo_vreg_get ( BUSVOODOO_LV_CHANNEL ) ; // set voltage on adjustable voltage regulator to be used by the embedded pull-ups
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}
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/** update LED status according to LED flags */
static void busvoodoo_led_update ( void )
{
if ( busvoodoo_global_led_blue & & busvoodoo_global_led_red ) { // both LEDs should be on
led_blink ( 0.01 , 0.5 ) ; // enable both LEDs (alternating at 100Hz)
} else if ( busvoodoo_global_led_blue ) { // only blue LED should be on
led_blink ( 0 , 1 ) ; // enable only blue LED
} else if ( busvoodoo_global_led_red ) { // only red LED should be on
led_blink ( 0 , 0 ) ; // enable only red LED
} else { // no LED should be on
led_off ( ) ; // disable both LEDs
}
}
void busvoodoo_led_blue ( uint16_t ms )
{
timer_disable_counter ( TIM ( BUSVOODOO_LED_TIMER ) ) ; // disable counter while changing LEDs to avoid coherence errors (at the cost of time precision)
if ( ms > UINT16_MAX / 2 ) { // enforce maximum
ms = UINT16_MAX / 2 ;
}
if ( 0 = = ms ) { // disable LED
busvoodoo_global_led_blue = false ; // remember we disabled the blue LED
} else {
busvoodoo_global_led_blue = true ; // remember the blue LED should be on
timer_set_oc_value ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_OC1 , timer_get_counter ( TIM ( BUSVOODOO_LED_TIMER ) ) + ms * 2 ) ; // use capture 1 to set LED timer
timer_clear_flag ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_SR_CC1IF ) ; // clear flag before enabling
timer_enable_irq ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_DIER_CC1IE ) ; // enable capture 1 for blue LED
}
busvoodoo_led_update ( ) ; // update LED status
timer_enable_counter ( TIM ( BUSVOODOO_LED_TIMER ) ) ; // re-enable timer
}
void busvoodoo_led_red ( uint16_t ms )
{
timer_disable_counter ( TIM ( BUSVOODOO_LED_TIMER ) ) ; // disable counter while changing LEDs to avoid coherence errors (at the cost of time precision)
if ( ms > UINT16_MAX / 2 ) { // enforce maximum
ms = UINT16_MAX / 2 ;
}
if ( 0 = = ms ) { // disable LED
busvoodoo_global_led_red = false ; // remember we disabled the blue LED
} else {
busvoodoo_global_led_red = true ; // remember the blue LED should be on
timer_set_oc_value ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_OC2 , timer_get_counter ( TIM ( BUSVOODOO_LED_TIMER ) ) + ms * 2 ) ; // use capture 1 to set LED timer
timer_clear_flag ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_SR_CC2IF ) ; // clear flag before enabling
timer_enable_irq ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_DIER_CC2IE ) ; // enable capture 2 for red LED
}
busvoodoo_led_update ( ) ; // update LED status
timer_enable_counter ( TIM ( BUSVOODOO_LED_TIMER ) ) ; // re-enable timer
}
/* command handlers */
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/** switch 3V3 and 5V power rails on/off
* @ param [ in ] argument string : " on " to switch on , " off " to switch off , NULL to get status
*/
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static void busvoodoo_global_power ( void * argument )
{
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float voltage ;
if ( NULL = = argument | | 0 = = strlen ( argument ) ) {
if ( gpio_get ( GPIO ( BUSVOODOO_VOUTEN_PORT ) , GPIO ( BUSVOODOO_VOUTEN_PIN ) ) ) { // check if power rails are switch on (enable low)
goto power_off ;
} else {
goto power_on ;
}
} else if ( 0 = = strcmp ( argument , " on " ) ) {
if ( busvoodoo_vout_switch ( true ) ) { // switch power rail on
printf ( " power rails switched on \n " ) ;
} else {
printf ( " power rails switched on but malfunctioning \n " ) ;
}
power_on :
voltage = busvoodoo_vreg_get ( BUSVOODOO_5V_CHANNEL ) ; // get 5V power rail voltage
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printf ( " 5V power rail: %.2fV \n " , voltage ) ;
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voltage = busvoodoo_vreg_get ( BUSVOODOO_3V3_CHANNEL ) ; // get 3.3V power rail voltage
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printf ( " 3V3 power rail: %.2fV \n " , voltage ) ;
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} else if ( 0 = = strcmp ( argument , " off " ) ) {
busvoodoo_vout_switch ( false ) ; // switch power rail off
printf ( " power rails switched off \n " ) ;
power_off :
printf ( " 5V power rail: off \n " ) ;
printf ( " 3V3 power rail: off \n " ) ;
} else {
printf ( " option malformed: %s \n " , argument ) ;
}
}
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/** set lV linear drop-out voltage regulator voltage
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* @ param [ in ] argument voltage to set ( 0 to switch off , NULL to get voltage )
*/
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static void busvoodoo_global_lv ( void * argument )
{
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if ( NULL = = argument ) {
if ( ! gpio_get ( GPIO ( BUSVOODOO_5VPULLUP_PORT ) , GPIO ( BUSVOODOO_5VPULLUP_PIN ) ) ) { // 5V input enabled
printf ( " 5V power rail used " ) ;
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} else if ( gpio_get ( GPIO ( BUSVOODOO_LVEN_PORT ) , GPIO ( BUSVOODOO_LVEN_PIN ) ) ) { // LV voltage regulator used
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printf ( " adjustable voltage regulator used " ) ;
} else {
printf ( " external voltage input " ) ;
}
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float voltage = busvoodoo_vreg_get ( BUSVOODOO_LV_CHANNEL ) ; // get LV voltage
// print LV voltage
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if ( voltage < 0.1 ) {
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printf ( " : 0.00V \n " ) ;
} else {
printf ( " : %.2fV \n " , voltage ) ;
}
} else {
double voltage = * ( ( double * ) argument ) ; // get desired voltage
if ( 0 = = voltage ) {
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printf ( " LV rail switched off " ) ;
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} else {
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printf ( " LV rail set to %.2fV " , voltage ) ;
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}
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voltage = busvoodoo_lv_set ( voltage ) ; // set LV voltage
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// print LV voltage
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if ( voltage < 0.1 ) {
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printf ( " : 0.00V \n " ) ;
} else {
printf ( " : %.2fV \n " , voltage ) ;
}
}
}
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/** set HV step-up voltage regulator voltage
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* @ param [ in ] argument voltage to set ( 0 to switch off , NULL to get voltage )
*/
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static void busvoodoo_global_hv ( void * argument )
{
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if ( ! busvoodoo_full ) {
printf ( " function not available on BusVoodoo light " ) ;
return ;
}
if ( NULL = = argument ) {
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printf ( " high voltage regulator switched %s: " , gpio_get ( GPIO ( BUSVOODOO_HVEN_PORT ) , GPIO ( BUSVOODOO_HVEN_PIN ) ) ? " off " : " on " ) ;
float voltage = busvoodoo_vreg_get ( BUSVOODOO_HV_CHANNEL ) ; // get HV voltage
// print LV voltage
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if ( voltage < 0.1 ) {
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printf ( " : 0.00V \n " ) ;
} else {
printf ( " : %.2fV \n " , voltage ) ;
}
} else {
double voltage = * ( ( double * ) argument ) ; // get desired voltage
printf ( " high voltage rail " ) ;
if ( voltage < = 3.3 ) {
printf ( " switched off " ) ;
} else {
printf ( " set to %.2fV " , voltage ) ;
}
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voltage = busvoodoo_hv_set ( voltage ) ; // set HV voltage
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// print HV voltage
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if ( voltage < 0.1 ) {
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printf ( " : 0.00V \n " ) ;
} else {
printf ( " : %.2fV \n " , voltage ) ;
}
}
}
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/** display I/O and RS/CAN connector pinouts
* @ param [ in ] argument not used
*/
static void busvoodoo_global_pinout ( void * argument )
{
( void ) argument ; // argument is not used
bool no_pinout = true ; // it no pinout has been displays
// display RS/CAN connector pinout
if ( busvoodoo_full ) { // only display on full version of the board
bool pin_used = false ; // if no pins are used
for ( uint8_t i = 0 ; i < LENGTH ( busvoodoo_global_pinout_rscan ) ; i + + ) { // verify if one of the pins is used
pin_used | = ( NULL ! = busvoodoo_global_pinout_rscan [ i ] ) ; // verify if pin is used
}
if ( pin_used ) {
// count the space used to display the pins
uint8_t space = 0 ; // no integer overflow protected (it's only cosmetic)
for ( uint8_t i = 0 ; i < LENGTH ( busvoodoo_global_pinout_rscan ) ; i + + ) {
if ( NULL = = busvoodoo_global_pinout_rscan [ i ] ) {
space + = 1 ; // only x will be shown
} else {
space + = strlen ( busvoodoo_global_pinout_rscan [ i ] ) ; // add size of pin name
}
}
space + = LENGTH ( busvoodoo_global_pinout_rscan ) - 1 ; // add the spaces between the names
// display pinout
printf ( " RS/CAN connector pinout: \n " ) ;
// display top line
printf ( " + " ) ;
for ( uint8_t i = 0 ; i < space ; i + + ) {
printf ( " - " ) ;
}
printf ( " + \n " ) ;
// display pin names
printf ( " | " ) ;
for ( int8_t i = LENGTH ( busvoodoo_global_pinout_rscan ) ; i > = 0 ; i - - ) {
if ( NULL = = busvoodoo_global_pinout_rscan [ i ] ) {
printf ( " x " ) ; // x stands for pin not used
} else {
printf ( " %s " , busvoodoo_global_pinout_rscan [ i ] ) ; // print pin name
}
if ( i > 0 ) {
printf ( " " ) ; // print space between the pin names
}
}
printf ( " | \n " ) ;
// display bottom line
printf ( " + " ) ;
for ( uint8_t i = 0 ; i < space ; i + + ) {
printf ( " - " ) ;
}
printf ( " + \n " ) ;
no_pinout = false ; // remember a pinout has been shown
}
}
// display I/O connector pinout
bool pin_used = false ; // if no pins are used
for ( uint8_t i = 0 ; i < LENGTH ( busvoodoo_global_pinout_io ) ; i + + ) { // verify if one of the pins is used
pin_used | = ( NULL ! = busvoodoo_global_pinout_io [ i ] ) ; // verify if pin is used
}
if ( pin_used ) {
// count the space used to display the pins (no integer overflow protected, it's only cosmetic)
uint8_t spaces [ 5 ] = { 0 } ; // maximum spaces used by top and bottom pins
for ( uint8_t i = 0 ; i < LENGTH ( spaces ) ; i + + ) {
if ( NULL = = busvoodoo_global_pinout_io [ i * 2 ] ) {
spaces [ i ] = 1 ; // only x will be shown
} else {
spaces [ i ] = strlen ( busvoodoo_global_pinout_io [ i * 2 ] ) ; // remember size of pin name
}
if ( NULL = = busvoodoo_global_pinout_io [ i * 2 + 1 ] ) {
if ( spaces [ i ] < 1 ) {
spaces [ i ] = 1 ; // only x will be shown
}
} else {
if ( spaces [ i ] < strlen ( busvoodoo_global_pinout_io [ i * 2 + 1 ] ) ) {
spaces [ i ] = strlen ( busvoodoo_global_pinout_io [ i * 2 + 1 ] ) ; // remember bigger size of pin name
}
}
}
// display pinout
printf ( " I/O connector pinout: \n " ) ;
// display top line
printf ( " + " ) ;
for ( uint16_t i = 0 ; i < ( uint16_t ) ( spaces [ 4 ] + spaces [ 3 ] + 1 ) ; i + + ) {
printf ( " - " ) ;
}
for ( uint16_t i = 0 ; i < ( uint16_t ) ( spaces [ 2 ] + 2 ) ; i + + ) {
printf ( " " ) ;
}
for ( uint16_t i = 0 ; i < ( uint16_t ) ( spaces [ 1 ] + spaces [ 0 ] + 1 ) ; i + + ) {
printf ( " - " ) ;
}
printf ( " + \n " ) ;
// display top pin names
printf ( " | " ) ;
for ( int8_t i = 4 ; i > = 0 ; i - - ) {
if ( NULL = = busvoodoo_global_pinout_io [ i * 2 ] ) {
printf ( " x " ) ; // x stands for pin not used
for ( int16_t j = 0 ; j < spaces [ i ] - 1 ; j + + ) {
printf ( " " ) ; // pad to match to bottom pin
}
} else {
printf ( " %s " , busvoodoo_global_pinout_io [ i * 2 ] ) ; // print pin name
for ( int16_t j = 0 ; j + strlen ( busvoodoo_global_pinout_io [ i * 2 ] ) < spaces [ i ] ; j + + ) {
printf ( " " ) ; // pad to match to bottom pin
}
}
if ( i > 0 ) {
printf ( " " ) ; // print space between the pin names
}
}
printf ( " | \n " ) ;
// display bottom pin names
printf ( " | " ) ;
for ( int8_t i = 4 ; i > = 0 ; i - - ) {
if ( NULL = = busvoodoo_global_pinout_io [ i * 2 + 1 ] ) {
printf ( " x " ) ; // x stands for pin not used
for ( int16_t j = 0 ; j < spaces [ i ] - 1 ; j + + ) {
printf ( " " ) ; // pad to match to bottom pin
}
} else {
printf ( " %s " , busvoodoo_global_pinout_io [ i * 2 + 1 ] ) ; // print pin name
for ( int16_t j = 0 ; j + strlen ( busvoodoo_global_pinout_io [ i * 2 + 1 ] ) < spaces [ i ] ; j + + ) {
printf ( " " ) ; // pad to match to bottom pin
}
}
if ( i > 0 ) {
printf ( " " ) ; // print space between the pin names
}
}
printf ( " | \n " ) ;
// display bottom line
printf ( " + " ) ;
for ( uint16_t i = 0 ; i < spaces [ 4 ] + 1 + spaces [ 3 ] + 1 + spaces [ 2 ] + 1 + spaces [ 1 ] + 1 + spaces [ 0 ] ; i + + ) {
printf ( " - " ) ;
}
printf ( " + \n " ) ;
no_pinout = false ; // remember a pinout has been shown
}
// in case nothing has been displayed
if ( no_pinout ) {
printf ( " no pins are used \n " ) ;
}
}
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/** list of supported commands */
const struct menu_command_t busvoodoo_global_commands [ ] = {
{
' p ' ,
" power " ,
" switch 3V3 and 5V power rails on/off " ,
MENU_ARGUMENT_STRING ,
" [on|off] " ,
& busvoodoo_global_power ,
} ,
{
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' L ' ,
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" LV " ,
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" set voltage on low voltage power rail (0, 0.3-4.8, 5V) " ,
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MENU_ARGUMENT_FLOAT ,
" [voltage] " ,
& busvoodoo_global_lv ,
} ,
{
' H ' ,
" HV " ,
" set voltage on high voltage power rail (0, 3.3-24V) " ,
MENU_ARGUMENT_FLOAT ,
" [voltage] " ,
& busvoodoo_global_hv ,
} ,
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{
' c ' ,
" connector " ,
" show connector pinout " ,
MENU_ARGUMENT_NONE ,
NULL ,
& busvoodoo_global_pinout ,
} ,
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} ;
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/** interrupt service routine called on LED timeout */
void TIM_ISR ( BUSVOODOO_LED_TIMER ) ( void )
{
if ( timer_get_flag ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_SR_CC1IF ) ) { // blue LED timeout
timer_clear_flag ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_SR_CC1IF ) ; // clear flag
timer_disable_irq ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_DIER_CC1IE ) ; // disable capture 1 for blue LED
busvoodoo_global_led_blue = false ; // remember blue LED should be disabled
busvoodoo_led_update ( ) ; // update LED status
} else if ( timer_get_flag ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_SR_CC2IF ) ) { // red LED timeout
timer_clear_flag ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_SR_CC2IF ) ; // clear flag
timer_disable_irq ( TIM ( BUSVOODOO_LED_TIMER ) , TIM_DIER_CC2IE ) ; // disable capture 2 for red LED
busvoodoo_global_led_red = false ; // remember red LED should be disabled
busvoodoo_led_update ( ) ; // update LED status
}
}