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swlink: Measure voltage on VDD pin of Stlink/Stm8s.

This commit is contained in:
Uwe Bonnes 2018-09-22 22:20:13 +02:00 committed by Gareth McMullin
parent 184ef991bf
commit 0d246fb31a
1 changed files with 42 additions and 1 deletions
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43
src/platforms/swlink/platform.c
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@ -39,6 +39,8 @@ uint32_t led_error_port;
uint16_t led_error_pin;
static uint8_t rev;
static void adc_init(void);
int platform_hwversion(void)
{
return rev;
@ -80,6 +82,7 @@ void platform_init(void)
/* LED GPIO already set in detect_rev()*/
led_error_port = GPIOA;
led_error_pin = GPIO8;
adc_init();
break;
case 1:
led_error_port = GPIOC;
@ -137,9 +140,47 @@ bool platform_srst_get_val(void)
return gpio_get(JRST_PORT, JRST_PIN) == 0;
}
static void adc_init(void)
{
rcc_periph_clock_enable(RCC_ADC1);
/* PA0 measures CN7 Pin 1 VDD divided by two.*/
gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_ANALOG, GPIO0);
adc_power_off(ADC1);
adc_disable_scan_mode(ADC1);
adc_set_single_conversion_mode(ADC1);
adc_disable_external_trigger_regular(ADC1);
adc_set_right_aligned(ADC1);
adc_set_sample_time_on_all_channels(ADC1, ADC_SMPR_SMP_28DOT5CYC);
adc_power_on(ADC1);
/* Wait for ADC starting up. */
for (int i = 0; i < 800000; i++) /* Wait a bit. */
__asm__("nop");
adc_reset_calibration(ADC1);
adc_calibrate(ADC1);
}
const char *platform_target_voltage(void)
{
return "unknown";
static char ret[] = "0.0V";
const uint8_t channel = 0;
switch (rev) {
case 0:
adc_set_regular_sequence(ADC1, 1, (uint8_t*)&channel);
adc_start_conversion_direct(ADC1);
/* Wait for end of conversion. */
while (!adc_eoc(ADC1));
/* Referencevoltage is 3.3 Volt, measured voltage is half of
* actual voltag. */
uint32_t val_in_100mV = (adc_read_regular(ADC1) * 33 * 2) / 4096;
ret[0] = '0' + val_in_100mV / 10;
ret[2] = '0' + val_in_100mV % 10;
return ret;
}
return "ABSENT!";
}
void set_idle_state(int state)