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application: add voltage control

This commit is contained in:
King Kévin 2021-03-11 10:50:50 +01:00
parent 8542c4e0f7
commit 0b0a27e670
1 changed files with 15 additions and 0 deletions
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15
application.c
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@ -55,6 +55,10 @@ static uint32_t boot_time = 0;
#define SIGNAL_CHANNEL 2 /**< PA2/ADC1_IN2 used to measure signal voltage */
const uint8_t channels[] = {ADC_CHANNEL17, ADC_CHANNEL(TARGET_CHANNEL), ADC_CHANNEL(SIGNAL_CHANNEL)}; /**< voltages to convert (channel 17 = internal voltage reference) */
#define SIGNAL_PD_PIN PA3 /**< pin to pull signal low for voltage measurement */
#define SIGNAL_PU_PIN PA4 /**< pin to pull signal to target voltage (controlling gate of pMOS) */
#define TARGET_EN PA5 /**< pin to provide target voltage to LV side of voltage shifter (pulling them high through 10 kO) */
size_t putc(char c)
{
size_t length = 0; // number of characters printed
@ -563,6 +567,17 @@ void main(void)
// important: do not re-enable backup_domain_write_protect, since this will prevent clearing flags (but RTC registers do not need to be unlocked)
puts("OK\n");
puts("setup voltage control: ");
rcc_periph_clock_enable(GPIO_RCC(SIGNAL_PD_PIN)); // enable clock for port domain
gpio_set(GPIO_PORT(SIGNAL_PD_PIN), GPIO_PIN(SIGNAL_PD_PIN)); // ensure we are not draining it
gpio_set_output_options(GPIO_PORT(SIGNAL_PD_PIN), GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ, GPIO_PIN(SIGNAL_PD_PIN)); // set output as open-drain
gpio_mode_setup(GPIO_PORT(SIGNAL_PD_PIN), GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN(SIGNAL_PD_PIN)); // configure pin as output
rcc_periph_clock_enable(GPIO_RCC(SIGNAL_PU_PIN)); // enable clock for port domain
gpio_set(GPIO_PORT(SIGNAL_PU_PIN), GPIO_PIN(SIGNAL_PU_PIN)); // ensure we are not enable pMOS
gpio_set_output_options(GPIO_PORT(SIGNAL_PU_PIN), GPIO_OTYPE_OD, GPIO_OSPEED_2MHZ, GPIO_PIN(SIGNAL_PU_PIN)); // set output as open-drain
gpio_mode_setup(GPIO_PORT(SIGNAL_PU_PIN), GPIO_MODE_OUTPUT, GPIO_PUPD_NONE, GPIO_PIN(SIGNAL_PU_PIN)); // configure pin as output
puts("OK\n");
puts("setup ADC to measure voltages: ");
rcc_periph_clock_enable(RCC_ADC1); // enable clock for ADC domain
adc_power_off(ADC1); // switch off ADC while configuring it