void adc_setup(void)
{
int i;
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_ADC1EN);
/* Make sure the ADC doesn't run during config. */
adc_off(ADC1);
/* We configure everything for one single conversion. */
adc_disable_scan_mode(ADC1);
adc_set_single_conversion_mode(ADC1);
adc_enable_discontinous_mode_regular(ADC1);
adc_disable_external_trigger_regular(ADC1);
adc_set_right_aligned(ADC1);
/* We want to read the temperature sensor, so we have to enable it. */
adc_enable_temperature_sensor(ADC1);
adc_set_conversion_time_on_all_channels(ADC1, ADC_SMPR_SMP_28DOT5CYC);
adc_on(ADC1);
/* Wait for ADC starting up. */
for (i = 0; i < 800000; i++) /* Wait a bit. */
__asm__("nop");
adc_reset_calibration(ADC1);
adc_calibration(ADC1);
}
static void setup_stm32f1_peripherals(void)
{
rcc_peripheral_enable_clock(&RCC_APB1ENR,
RCC_APB1ENR_I2C1EN);
rcc_peripheral_enable_clock(&RCC_APB2ENR,
RCC_APB2ENR_ADC1EN);
/* GPIO pin for I2C1 SCL, SDA */
/* VESNA v1.0
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, GPIO6);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, GPIO7);
*/
/* VESNA v1.1 */
AFIO_MAPR |= AFIO_MAPR_I2C1_REMAP;
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, TDA_PIN_SCL);
gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_50_MHZ,
GPIO_CNF_OUTPUT_ALTFN_OPENDRAIN, TDA_PIN_SDA);
/* GPIO pin for TDA18219 IRQ */
gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_FLOAT, TDA_PIN_IRQ);
/* GPIO pin for TDA18219 IF AGC */
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, TDA_PIN_IF_AGC);
/* Set to lowest gain for now */
gpio_clear(GPIOA, TDA_PIN_IF_AGC);
/* GPIO pin for AD8307 ENB */
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_2_MHZ,
GPIO_CNF_OUTPUT_PUSHPULL, TDA_PIN_ENB);
/* ADC pin for AD8307 output */
gpio_set_mode(GPIOA, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_ANALOG, TDA_PIN_OUT);
/* Setup I2C */
i2c_peripheral_disable(I2C1);
/* 400 kHz - I2C Fast Mode */
i2c_set_clock_frequency(I2C1, I2C_CR2_FREQ_24MHZ);
i2c_set_fast_mode(I2C1);
/* 400 kHz */
i2c_set_ccr(I2C1, 0x14);
/* 300 ns rise time */
i2c_set_trise(I2C1, 0x08);
i2c_peripheral_enable(I2C1);
/* Make sure the ADC doesn't run during config. */
adc_off(ADC1);
/* We configure everything for one single conversion. */
adc_disable_scan_mode(ADC1);
adc_set_single_conversion_mode(ADC1);
adc_enable_discontinous_mode_regular(ADC1);
adc_disable_external_trigger_regular(ADC1);
adc_set_right_aligned(ADC1);
adc_set_conversion_time_on_all_channels(ADC1, ADC_SMPR_SMP_28DOT5CYC);
adc_on(ADC1);
/* Wait for ADC starting up. */
int i;
for (i = 0; i < 800000; i++) /* Wait a bit. */
__asm__("nop");
adc_reset_calibration(ADC1);
adc_calibration(ADC1);
uint8_t channel_array[16];
/* Select the channel we want to convert. */
if(TDA_PIN_OUT == GPIO0) {
channel_array[0] = 0;
} else if(TDA_PIN_OUT == GPIO2) {
channel_array[0] = 2;
}
adc_set_regular_sequence(ADC1, 1, channel_array);
}
