use defines for the USART pins (incomplete)
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lib/usart_soft.c
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lib/usart_soft.c
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@ -33,78 +33,206 @@
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#include "global.h" // common methods
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/** @defgroup usart_soft_gpio GPIO used for the software USART ports
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* @note up to 4 pins supported, comment if unused
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* @{
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*/
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static const uint32_t usart_soft_rx_ports[USART_SOFT_RX_PORTS] = {0}; /**< GPIO ports for receive signals */
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static const uint32_t usart_soft_rx_pins[USART_SOFT_RX_PORTS] = {0}; /**< GPIO pins for receive signals */
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static const uint32_t usart_soft_tx_ports[USART_SOFT_TX_PORTS] = {0}; /**< GPIO ports for transmit signals */
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static const uint32_t usart_soft_tx_pins[USART_SOFT_TX_PORTS] = {0}; /**< GPIO pins for transmit signals */
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#define USART_SOFT_RX_PORT0 A
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#define USART_SOFT_RX_PIN0 0
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#define USART_SOFT_RX_PORT1 A
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#define USART_SOFT_RX_PIN1 0
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#define USART_SOFT_RX_PORT2 A
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#define USART_SOFT_RX_PIN2 0
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#define USART_SOFT_RX_PORT3 A
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#define USART_SOFT_RX_PIN3 0
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#define USART_SOFT_TX_PORT0 A
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#define USART_SOFT_TX_PIN0 0
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#define USART_SOFT_TX_PORT1 A
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#define USART_SOFT_TX_PIN1 0
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#define USART_SOFT_TX_PORT2 A
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#define USART_SOFT_TX_PIN2 0
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#define USART_SOFT_TX_PORT3 A
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#define USART_SOFT_TX_PIN3 0
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/** @} */
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/** @defgroup usart_soft_config USART configurations
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/** @defgroup usart_soft_config USART configurations (2400-115200 bps)
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* @note this implementation is designed for 8 bits, no parity, any stop configuration since this is the most common case
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* @{
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*/
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static const uint32_t usart_soft_rx_baudrates[USART_SOFT_RX_PORTS] = {9600}; /**< receive signal baudrates (2400-115200) */
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static const uint32_t usart_soft_tx_baudrates[USART_SOFT_TX_PORTS] = {0}; /**< transmit signal baudrates (2400-115200) */
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#define USART_SOFT_RX_BAUDRATE0 0
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#define USART_SOFT_RX_BAUDRATE1 0
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#define USART_SOFT_RX_BAUDRATE2 0
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#define USART_SOFT_RX_BAUDRATE3 0
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#define USART_SOFT_TX_BAUDRATE0 0
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#define USART_SOFT_TX_BAUDRATE1 0
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#define USART_SOFT_TX_BAUDRATE2 0
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#define USART_SOFT_TX_BAUDRATE3 0
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/** @} */
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/** @defgroup usart_soft_timer timer used to same USART signals
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* @{
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*/
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#define USART_SOFT_RX_TIMER 3 /**< timer peripheral for receive signals */
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#define USART_SOFT_TX_TIMER 4 /**< timer peripheral for transmit signals */
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#if (defined(USART_SOFT_RX_PORT0) && defined(USART_SOFT_RX_PIN0)) || (defined(USART_SOFT_RX_PORT1) && defined(USART_SOFT_RX_PIN1)) || (defined(USART_SOFT_RX_PORT2) && defined(USART_SOFT_RX_PIN2)) || (defined(USART_SOFT_RX_PORT3) && defined(USART_SOFT_RX_PIN0))
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#define USART_SOFT_RX_TIMER 3 /**< timer peripheral for receive signals */
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#endif
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#if (defined(USART_SOFT_TX_PORT0) && defined(USART_SOFT_TX_PIN0)) || (defined(USART_SOFT_TX_PORT1) && defined(USART_SOFT_TX_PIN1)) || (defined(USART_SOFT_TX_PORT2) && defined(USART_SOFT_TX_PIN2)) || (defined(USART_SOFT_TX_PORT3) && defined(USART_SOFT_TX_PIN0))
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#define USART_SOFT_TX_TIMER 4 /**< timer peripheral for transmit signals */
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#endif
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/** @} */
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/** @defgroup usart_soft_state
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* @{
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*/
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#if (defined(USART_SOFT_RX_PORT0) && defined(USART_SOFT_RX_PIN0))
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volatile bool rx0_state = 0; /**< state of the GPIO */
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volatile uint8_t rx0_bit = 0; /**< next bit to receive */
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#endif
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/** @} */
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bool usart_soft_setup(void)
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{
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// verify configuration
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if ((USART_SOFT_RX_PORTS<0) || (USART_SOFT_RX_PORTS>4)) {
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#if (defined(USART_SOFT_RX_BAUDRATE0) && ((USART_SOFT_RX_BAUDRATE0<2400) || (USART_SOFT_RX_BAUDRATE0>115200)))
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return false;
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}
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if ((USART_SOFT_TX_PORTS<0) || (USART_SOFT_TX_PORTS>4)) {
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#endif
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#if (defined(USART_SOFT_RX_BAUDRATE1) && ((USART_SOFT_RX_BAUDRATE1<2400) || (USART_SOFT_RX_BAUDRATE1>115200)))
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return false;
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}
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for (uint8_t i = 0; i < USART_SOFT_RX_PORTS; i++) {
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if ((usart_soft_rx_baudrates[i]<2400) || (usart_soft_rx_baudrates[i]>115200)) {
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return false;
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}
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}
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for (uint8_t i = 0; i < USART_SOFT_TX_PORTS; i++) {
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if ((usart_soft_tx_baudrates[i]<2400) || (usart_soft_tx_baudrates[i]>115200)) {
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return false;
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}
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}
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#endif
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#if (defined(USART_SOFT_RX_BAUDRATE2) && ((USART_SOFT_RX_BAUDRATE2<2400) || (USART_SOFT_RX_BAUDRATE2>115200)))
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return false;
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#endif
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#if (defined(USART_SOFT_RX_BAUDRATE3) && ((USART_SOFT_RX_BAUDRATE3<2400) || (USART_SOFT_RX_BAUDRATE3>115200)))
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return false;
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#endif
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#if (defined(USART_SOFT_TX_BAUDRATE0) && ((USART_SOFT_TX_BAUDRATE0<2400) || (USART_SOFT_TX_BAUDRATE0>115200)))
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return false;
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#endif
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#if (defined(USART_SOFT_TX_BAUDRATE1) && ((USART_SOFT_TX_BAUDRATE1<2400) || (USART_SOFT_TX_BAUDRATE1>115200)))
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return false;
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#endif
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#if (defined(USART_SOFT_TX_BAUDRATE2) && ((USART_SOFT_TX_BAUDRATE2<2400) || (USART_SOFT_TX_BAUDRATE2>115200)))
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return false;
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#endif
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#if (defined(USART_SOFT_TX_BAUDRATE3) && ((USART_SOFT_TX_BAUDRATE3<2400) || (USART_SOFT_TX_BAUDRATE3>115200)))
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return false;
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#endif
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// setup GPIOs
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for (uint8_t i = 0; i < USART_SOFT_RX_PORTS; i++) {
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rcc_periph_clock_enable(RCC_GPIO[usart_soft_rx_ports[i]]); // enable clock for GPIO peripheral
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gpio_set_mode(GPIO_PORT[usart_soft_rx_ports[i]], GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO_PIN(usart_soft_rx_pins[i])); // setup GPIO pin USART receive
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gpio_set(GPIO_PORT[usart_soft_rx_ports[i]], GPIO_PIN(usart_soft_rx_pins[i])); // pull up to avoid noise when not connected
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}
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for (uint8_t i = 0; i < USART_SOFT_TX_PORTS; i++) {
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rcc_periph_clock_enable(RCC_GPIO[usart_soft_tx_ports[i]]); // enable clock for GPIO peripheral
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gpio_set_mode(GPIO_PORT[usart_soft_tx_ports[i]], GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO_PIN(usart_soft_tx_pins[i])); // setup GPIO pin USART transmit
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}
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#if defined(USART_SOFT_RX_PORT0) && defined(USART_SOFT_RX_PIN0)
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rcc_periph_clock_enable(RCC_GPIO(USART_SOFT_RX_PORT0)); // enable clock for GPIO peripheral
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gpio_set_mode(GPIO(USART_SOFT_RX_PORT0), GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO(USART_SOFT_RX_PIN0)); // setup GPIO pin USART receive
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gpio_set(GPIO(USART_SOFT_RX_PORT0), GPIO(USART_SOFT_RX_PIN0)); // pull up to avoid noise when not connected
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rx0_state = gpio_get(GPIO(USART_SOFT_RX_PORT0), GPIO(USART_SOFT_RX_PIN0)); // save state of GPIO
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rx0_bit = 0; // reset bits received
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#endif
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#if defined(USART_SOFT_RX_PORT1) && defined(USART_SOFT_RX_PIN1)
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rcc_periph_clock_enable(RCC_GPIO(USART_SOFT_RX_PORT1)); // enable clock for GPIO peripheral
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gpio_set_mode(GPIO(USART_SOFT_RX_PORT1), GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO(USART_SOFT_RX_PIN1)); // setup GPIO pin USART receive
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gpio_set(GPIO(USART_SOFT_RX_PORT1), GPIO(USART_SOFT_RX_PIN1)); // pull up to avoid noise when not connected
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#endif
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#if defined(USART_SOFT_RX_PORT2) && defined(USART_SOFT_RX_PIN2)
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rcc_periph_clock_enable(RCC_GPIO(USART_SOFT_RX_PORT2)); // enable clock for GPIO peripheral
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gpio_set_mode(GPIO(USART_SOFT_RX_PORT2), GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO(USART_SOFT_RX_PIN2)); // setup GPIO pin USART receive
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gpio_set(GPIO(USART_SOFT_RX_PORT2), GPIO(USART_SOFT_RX_PIN2)); // pull up to avoid noise when not connected
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#endif
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#if defined(USART_SOFT_RX_PORT3) && defined(USART_SOFT_RX_PIN3)
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rcc_periph_clock_enable(RCC_GPIO(USART_SOFT_RX_PORT3)); // enable clock for GPIO peripheral
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gpio_set_mode(GPIO(USART_SOFT_RX_PORT3), GPIO_MODE_INPUT, GPIO_CNF_INPUT_PULL_UPDOWN, GPIO(USART_SOFT_RX_PIN3)); // setup GPIO pin USART receive
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gpio_set(GPIO(USART_SOFT_RX_PORT3), GPIO(USART_SOFT_RX_PIN3)); // pull up to avoid noise when not connected
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#endif
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#if defined(USART_SOFT_TX_PORT0) && defined(USART_SOFT_TX_PIN0)
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rcc_periph_clock_enable(RCC_GPIO(USART_SOFT_TX_PORT0)); // enable clock for GPIO peripheral
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gpio_set_mode(GPIO(USART_SOFT_TX_PORT0), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(USART_SOFT_TX_PIN0));
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#endif
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#if defined(USART_SOFT_TX_PORT1) && defined(USART_SOFT_TX_PIN1)
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rcc_periph_clock_enable(RCC_GPIO(USART_SOFT_TX_PORT1)); // enable clock for GPIO peripheral
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gpio_set_mode(GPIO(USART_SOFT_TX_PORT1), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(USART_SOFT_TX_PIN1));
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#endif
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#if defined(USART_SOFT_TX_PORT2) && defined(USART_SOFT_TX_PIN2)
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rcc_periph_clock_enable(RCC_GPIO(USART_SOFT_TX_PORT2)); // enable clock for GPIO peripheral
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gpio_set_mode(GPIO(USART_SOFT_TX_PORT2), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(USART_SOFT_TX_PIN2));
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#endif
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#if defined(USART_SOFT_TX_PORT3) && defined(USART_SOFT_TX_PIN3)
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rcc_periph_clock_enable(RCC_GPIO(USART_SOFT_TX_PORT3)); // enable clock for GPIO peripheral
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gpio_set_mode(GPIO(USART_SOFT_TX_PORT3), GPIO_MODE_OUTPUT_2_MHZ, GPIO_CNF_OUTPUT_PUSHPULL, GPIO(USART_SOFT_TX_PIN3));
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#endif
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// setup timer
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if (USART_SOFT_RX_PORTS>0) {
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rcc_periph_clock_enable(RCC_TIM[USART_SOFT_RX_TIMER]); // enable clock for timer peripheral
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timer_reset(TIM[USART_SOFT_RX_TIMER]); // reset timer state
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timer_set_mode(TIM[USART_SOFT_RX_TIMER], TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP); // set timer mode, use undivided timer clock, edge alignment (simple count), and count up
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timer_set_prescaler(TIM[USART_SOFT_RX_TIMER], 0); // prescaler to be able to sample 2400-115200 bps (72MHz/2^16=1099<2400bps)
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nvic_enable_irq(NVIC_TIM_IRQ[USART_SOFT_RX_TIMER]); // allow interrupt for timer
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}
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if (USART_SOFT_TX_PORTS>0) {
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rcc_periph_clock_enable(RCC_TIM[USART_SOFT_TX_TIMER]); // enable clock for timer peripheral
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timer_reset(TIM[USART_SOFT_TX_TIMER]); // reset timer state
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timer_set_mode(TIM[USART_SOFT_TX_TIMER], TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP); // set timer mode, use undivided timer clock, edge alignment (simple count), and count up
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timer_set_prescaler(TIM[USART_SOFT_TX_TIMER], 0); // prescaler to be able to sample 2400-115200 bps (72MHz/2^16=1099<2400bps)
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nvic_enable_irq(NVIC_TIM_IRQ[USART_SOFT_TX_TIMER]); // allow interrupt for timer
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}
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#if defined(USART_SOFT_RX_TIMER)
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rcc_periph_clock_enable(RCC_TIM(USART_SOFT_RX_TIMER)); // enable clock for timer peripheral
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timer_reset(TIM(USART_SOFT_RX_TIMER)); // reset timer state
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timer_set_mode(TIM(USART_SOFT_RX_TIMER), TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP); // set timer mode, use undivided timer clock, edge alignment (simple count), and count up
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timer_set_prescaler(TIM(USART_SOFT_RX_TIMER), 0); // prescaler to be able to sample 2400-115200 bps (72MHz/2^16=1099<2400bps)
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nvic_enable_irq(NVIC_TIM_IRQ(USART_SOFT_RX_TIMER)); // allow interrupt for timer
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#endif
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#if defined(USART_SOFT_TX_TIMER)
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rcc_periph_clock_enable(RCC_TIM(USART_SOFT_TX_TIMER)); // enable clock for timer peripheral
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timer_reset(TIM(USART_SOFT_TX_TIMER)); // reset timer state
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timer_set_mode(TIM(USART_SOFT_TX_TIMER), TIM_CR1_CKD_CK_INT, TIM_CR1_CMS_EDGE, TIM_CR1_DIR_UP); // set timer mode, use undivided timer clock, edge alignment (simple count), and count up
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timer_set_prescaler(TIM(USART_SOFT_TX_TIMER), 0); // prescaler to be able to sample 2400-115200 bps (72MHz/2^16=1099<2400bps)
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nvic_enable_irq(NVIC_TIM_IRQ(USART_SOFT_TX_TIMER)); // allow interrupt for timer
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#endif
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return true; // setup completed
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}
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#if defined(USART_SOFT_RX_TIMER)
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void TIM_ISR(USART_SOFT_RX_TIMER)(void)
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{
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}
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#endif
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#if defined(USART_SOFT_TX_TIMER)
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void TIM_ISR(USART_SOFT_TX_TIMER)(void)
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{
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}
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#endif
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/** central function handling receive signal activity */
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static void rx_activity(void)
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{
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}
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#if (defined(USART_SOFT_RX_PORT0) && defined(USART_SOFT_RX_PIN0) && USART_SOFT_RX_PIN0==0) || (defined(USART_SOFT_RX_PORT1) && defined(USART_SOFT_RX_PIN1) && USART_SOFT_RX_PIN1==0) || (defined(USART_SOFT_RX_PORT2) && defined(USART_SOFT_RX_PIN2) && USART_SOFT_RX_PIN2==0) || (defined(USART_SOFT_RX_PORT3) && defined(USART_SOFT_RX_PIN3) && USART_SOFT_RX_PIN3==0)
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void exti0_isr(void)
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{
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rx_activity();
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}
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#endif
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#if (defined(USART_SOFT_RX_PORT0) && defined(USART_SOFT_RX_PIN0) && USART_SOFT_RX_PIN0==1) || (defined(USART_SOFT_RX_PORT1) && defined(USART_SOFT_RX_PIN1) && USART_SOFT_RX_PIN1==1) || (defined(USART_SOFT_RX_PORT2) && defined(USART_SOFT_RX_PIN2) && USART_SOFT_RX_PIN2==1) || (defined(USART_SOFT_RX_PORT3) && defined(USART_SOFT_RX_PIN3) && USART_SOFT_RX_PIN3==1)
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void exti1_isr(void)
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{
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rx_activity();
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}
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#endif
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#if (defined(USART_SOFT_RX_PORT0) && defined(USART_SOFT_RX_PIN0) && USART_SOFT_RX_PIN0==2) || (defined(USART_SOFT_RX_PORT1) && defined(USART_SOFT_RX_PIN1) && USART_SOFT_RX_PIN1==2) || (defined(USART_SOFT_RX_PORT2) && defined(USART_SOFT_RX_PIN2) && USART_SOFT_RX_PIN2==2) || (defined(USART_SOFT_RX_PORT3) && defined(USART_SOFT_RX_PIN3) && USART_SOFT_RX_PIN3==2)
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void exti2_isr(void)
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{
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rx_activity();
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}
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#endif
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#if (defined(USART_SOFT_RX_PORT0) && defined(USART_SOFT_RX_PIN0) && USART_SOFT_RX_PIN0==3) || (defined(USART_SOFT_RX_PORT1) && defined(USART_SOFT_RX_PIN1) && USART_SOFT_RX_PIN1==3) || (defined(USART_SOFT_RX_PORT2) && defined(USART_SOFT_RX_PIN2) && USART_SOFT_RX_PIN2==3) || (defined(USART_SOFT_RX_PORT3) && defined(USART_SOFT_RX_PIN3) && USART_SOFT_RX_PIN3==3)
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void exti3_isr(void)
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{
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rx_activity();
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}
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#endif
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#if (defined(USART_SOFT_RX_PORT0) && defined(USART_SOFT_RX_PIN0) && USART_SOFT_RX_PIN0==4) || (defined(USART_SOFT_RX_PORT1) && defined(USART_SOFT_RX_PIN1) && USART_SOFT_RX_PIN1==4) || (defined(USART_SOFT_RX_PORT2) && defined(USART_SOFT_RX_PIN2) && USART_SOFT_RX_PIN2==4) || (defined(USART_SOFT_RX_PORT3) && defined(USART_SOFT_RX_PIN3) && USART_SOFT_RX_PIN3==4)
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void exti4_isr(void)
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{
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rx_activity();
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}
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#endif
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#if (defined(USART_SOFT_RX_PORT0) && defined(USART_SOFT_RX_PIN0) && (USART_SOFT_RX_PIN0==5 || USART_SOFT_RX_PIN0==6 || USART_SOFT_RX_PIN0==7 || USART_SOFT_RX_PIN0==8 || USART_SOFT_RX_PIN0==9)) || (defined(USART_SOFT_RX_PORT1) && defined(USART_SOFT_RX_PIN1) && (USART_SOFT_RX_PIN1==5 || USART_SOFT_RX_PIN1==6 || USART_SOFT_RX_PIN1==7 || USART_SOFT_RX_PIN1==8 || USART_SOFT_RX_PIN1==9)) || (defined(USART_SOFT_RX_PORT2) && defined(USART_SOFT_RX_PIN2) && (USART_SOFT_RX_PIN2==5 || USART_SOFT_RX_PIN2==6 || USART_SOFT_RX_PIN2==7 || USART_SOFT_RX_PIN2==8 || USART_SOFT_RX_PIN2==9)) || (defined(USART_SOFT_RX_PORT3) && defined(USART_SOFT_RX_PIN3) && (USART_SOFT_RX_PIN3==5 || USART_SOFT_RX_PIN3==6 || USART_SOFT_RX_PIN3==7 || USART_SOFT_RX_PIN3==8 || USART_SOFT_RX_PIN3==9))
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void exti9_5_isr(void)
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{
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rx_activity();
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}
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#endif
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#if (defined(USART_SOFT_RX_PORT0) && defined(USART_SOFT_RX_PIN0) && (USART_SOFT_RX_PIN0==10 || USART_SOFT_RX_PIN0==11 || USART_SOFT_RX_PIN0==12 || USART_SOFT_RX_PIN0==13 || USART_SOFT_RX_PIN0==14 || USART_SOFT_RX_PIN0==15)) || (defined(USART_SOFT_RX_PORT1) && defined(USART_SOFT_RX_PIN1) && (USART_SOFT_RX_PIN1==10 || USART_SOFT_RX_PIN1==11 || USART_SOFT_RX_PIN1==12 || USART_SOFT_RX_PIN1==13 || USART_SOFT_RX_PIN1==14 || USART_SOFT_RX_PIN1==15)) || (defined(USART_SOFT_RX_PORT2) && defined(USART_SOFT_RX_PIN2) && (USART_SOFT_RX_PIN2==10 || USART_SOFT_RX_PIN2==11 || USART_SOFT_RX_PIN2==12 || USART_SOFT_RX_PIN2==13 || USART_SOFT_RX_PIN2==14 || USART_SOFT_RX_PIN2==15)) || (defined(USART_SOFT_RX_PORT3) && defined(USART_SOFT_RX_PIN3) && (USART_SOFT_RX_PIN3==10 || USART_SOFT_RX_PIN3==11 || USART_SOFT_RX_PIN3==12 || USART_SOFT_RX_PIN3==13 || USART_SOFT_RX_PIN3==14 || USART_SOFT_RX_PIN3==15))
|
||||
void exti15_10_isr(void)
|
||||
{
|
||||
rx_activity();
|
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}
|
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#endif
|
||||
|
||||
|
|
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|||
|
|
@ -19,15 +19,6 @@
|
|||
* @note peripherals used: GPIO @ref usart_soft_gpio, timer @ref usart_soft_timer
|
||||
*/
|
||||
|
||||
/** number of software USART receive ports (0-4)
|
||||
* @note the corresponding GPIOs need to be configured in @p usart_soft_gpio
|
||||
*/
|
||||
#define USART_SOFT_RX_PORTS 1
|
||||
/** number of software USART transmit ports (0-4)
|
||||
* @note the corresponding GPIOs need to be configured in @p usart_soft_gpio
|
||||
*/
|
||||
#define USART_SOFT_TX_PORTS 1
|
||||
|
||||
/** setup software USART ports
|
||||
* @return is setup succeeded, else the configuration is wrong
|
||||
*/
|
||||
|
|
|
|||
Loading…
Reference in New Issue