static uint16_t read_adc_naiive(uint8_t channel)
{
uint8_t channel_array[16];
channel_array[0] = channel;
adc_set_regular_sequence(ADC1, 1, channel_array);
adc_start_conversion_regular(ADC1);
while (!adc_eoc(ADC1));
uint16_t reg16 = adc_read_regular(ADC1);
return reg16;
}
/**
* NOTE this is a state machine, but it expects to run often enough for millis()
* @param machine
* @param res
*/
void jack_run_task(volatile struct jacks_machine_t *machine, struct jacks_result_t *res)
{
res->ready = false;
if (!jack_connected(machine->jack)) {
return;
}
switch (machine->step) {
case jack_machine_step_off:
// is it time to do a reading yet?
if (millis() - 3000 > machine->last_read_millis) {
printf("switching power on: channel %u\n", (unsigned int) machine->jack->val_channel);
gpio_set(machine->jack->power_port, machine->jack->power_pin);
machine->step = jack_machine_step_powered;
machine->step_entry_millis = millis();
}
break;
case jack_machine_step_powered:
// have we been powered up long enough yet?
if (millis() - machine->jack->power_on_time_millis > machine->step_entry_millis) {
printf("power stable!\n");
machine->step = jack_machine_step_ready;
// not really necessary... machine->step_entry_millis = millis();
} else {
printf(".");
}
break;
case jack_machine_step_ready:
// TODO - this should actually start a dma sequence and go to a next step
// that decimates/averages and finally returns.
// ok! do a few readings and call it good
adc_disable_scan_mode(ADC1);
adc_set_single_conversion_mode(ADC1);
adc_set_sample_time_on_all_channels(ADC1, ADC_SMPR_SMP_28DOT5CYC);
//adc_set_single_channel(ADC1, machine->jack->val_channel);
adc_set_regular_sequence(ADC1, 1, (u8*)&(machine->jack->val_channel));
adc_enable_external_trigger_regular(ADC1, ADC_CR2_EXTSEL_SWSTART);
adc_start_conversion_regular(ADC1);
printf("ok, doing reading on channel!\n");
while(!adc_eoc(ADC1)) {
;
}
res->ready = true;
res->value = adc_read_regular(ADC1);
machine->last_value = res->value;
machine->last_read_millis = millis();
gpio_clear(machine->jack->power_port, machine->jack->power_pin);
machine->step = jack_machine_step_off;
break;
}
return;
}
float voltage_measure (uint32_t adc,uint8_t channel)
{
uint8_t channels[16];
float voltage;
channels[0] = channel;
adc_set_regular_sequence(adc, 1, channels);
adc_start_conversion_regular(adc);
gpio_toggle (GPIOD,GPIO15);
while (!adc_eoc(adc));
voltage=adc_read_regular(adc)*(VREF/ADC_CONVERSION_FACTOR);
return voltage;
}
int main(void)
{
uint16_t temp;
clock_setup();
gpio_setup();
adc_setup();
usart_setup();
while (1) {
adc_start_conversion_regular(ADC1);
while (!(adc_eoc(ADC1)));
temp=adc_read_regular(ADC1);
gpio_port_write(GPIOE, temp << 4);
my_usart_print_int(USART2, temp);
}
return 0;
}
/*--------------------------------------------------------------------*/
int main(void)
{
uint32_t i,j;
cntr=4;
clock_setup();
gpio_setup();
adc_setup();
dma_setup();
/* Start of the ADC. Should continue indefinitely with DMA in circular mode */
adc_start_conversion_regular(ADC1);
while (1) {
/* Blink the LED (PB8, PB9) on the board. */
uint32_t count = 500*v[1];
gpio_toggle(GPIOD, GPIO12);
for (i = 0; i < count; i++) __asm__("nop");
gpio_toggle(GPIOD, GPIO13);
for (i = 0; i < count; i++) __asm__("nop");
}
return 0;
}
int main(void)
{
uint16_t temp;
adc_setup();
usart_setup();
while (1) {
adc_start_conversion_regular(ADC1);
while (!(adc_eoc(ADC1)));
temp = adc_read_regular(ADC1);
my_usart_print_int(USART1, temp);
int i;
for (i = 0; i < 800000; i++) { /* Wait a bit. */
__asm__("nop");
}
}
return 0;
}
void adc_gather() {
adc_start_conversion_regular(ADC1);
}
uint16_t battery_sense_read() {
adc_start_conversion_regular(BAT_SENSE_ADC);
while (!adc_eoc(BAT_SENSE_ADC));
return adc_read_regular(BAT_SENSE_ADC);
}
/**
* Initialize analog to digital converter
*/
void adc_init(adc_callback_t half_transfer_callback,
adc_callback_t transfer_complete_callback)
{
/* Reset adc_state. */
adc_state.dma_transfer_error_counter = 0;
adc_state.half_transfer_callback = half_transfer_callback;
adc_state.transfer_complete_callback = transfer_complete_callback;
/* Initialize peripheral clocks. */
rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_DMA1EN);
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN);
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_ADC1EN);
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_ADC2EN);
/* Initialize the ADC input GPIO. */
/* WARNING: this code is written to work with strip. On the strip
* hardware we are lucky and all the ADC channels are on the same bank
* so we can initialize all of them in one go. This code will need to be
* changed/improved if we ever have to support hardware that has the
* ADC's spread over more then one bank.
*/
gpio_set_mode(ADC_BANK, GPIO_MODE_INPUT,
GPIO_CNF_INPUT_ANALOG, ADC_PORT_U_VOLTAGE |
ADC_PORT_V_VOLTAGE |
ADC_PORT_W_VOLTAGE |
ADC_PORT_V_BATT |
ADC_PORT_CURRENT);
/* Configure DMA for data aquisition. */
/* Channel 1 reacts to: ADC1, TIM2_CH3 and TIM4_CH1 */
dma_channel_reset(DMA1, DMA_CHANNEL1);
dma_set_peripheral_address(DMA1, DMA_CHANNEL1, (uint32_t)&ADC1_DR);
dma_set_memory_address(DMA1, DMA_CHANNEL1,
(uint32_t)adc_state.raw_data);
dma_set_number_of_data(DMA1, DMA_CHANNEL1, ADC_RAW_SAMPLE_COUNT/2);
dma_set_read_from_peripheral(DMA1, DMA_CHANNEL1);
dma_enable_memory_increment_mode(DMA1, DMA_CHANNEL1);
dma_enable_circular_mode(DMA1, DMA_CHANNEL1);
dma_set_peripheral_size(DMA1, DMA_CHANNEL1, DMA_CCR_PSIZE_32BIT);
dma_set_memory_size(DMA1, DMA_CHANNEL1, DMA_CCR_MSIZE_32BIT);
dma_set_priority(DMA1, DMA_CHANNEL1, DMA_CCR_PL_VERY_HIGH);
dma_enable_half_transfer_interrupt(DMA1, DMA_CHANNEL1);
dma_enable_transfer_complete_interrupt(DMA1, DMA_CHANNEL1);
dma_enable_transfer_error_interrupt(DMA1, DMA_CHANNEL1);
dma_enable_channel(DMA1, DMA_CHANNEL1);
/* Configure interrupts in NVIC. */
nvic_set_priority(NVIC_DMA1_CHANNEL1_IRQ, 0);
nvic_enable_irq(NVIC_DMA1_CHANNEL1_IRQ);
/* Disable ADC's. */
adc_off(ADC1);
adc_off(ADC2);
/* Enable dualmode. */
adc_set_dual_mode(ADC_CR1_DUALMOD_RSM); /* Dualmode regular only. */
/* Configure the adc channels. */
adc_config(ADC1, adc1_channel_array);
adc_config(ADC2, adc2_channel_array);
/* Start converting. */
adc_start_conversion_regular(ADC1);
}
