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#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"
int main(void)
{
system_clock_config();
at32_board_init();
/* turn led2/led3/led4 on */
at32_led_on(LED2);
at32_led_on(LED3);
at32_led_on(LED4);
/* enable dac/dma1/gpioa clock */
crm_periph_clock_enable(CRM_DMA1_PERIPH_CLOCK, TRUE);
crm_periph_clock_enable(CRM_DAC_PERIPH_CLOCK, TRUE);
crm_periph_clock_enable(CRM_GPIOA_PERIPH_CLOCK, TRUE);
/* once the dac is enabled, the corresponding gpio pin is automatically
connected to the dac converter. in order to avoid parasitic consumption,
the gpio pin should be configured in analog */
gpio_init_struct.gpio_pins = GPIO_PINS_4 | GPIO_PINS_5;
gpio_init_struct.gpio_mode = GPIO_MODE_ANALOG;
gpio_init_struct.gpio_out_type = GPIO_OUTPUT_PUSH_PULL;
gpio_init_struct.gpio_pull = GPIO_PULL_NONE;
gpio_init_struct.gpio_drive_strength = GPIO_DRIVE_STRENGTH_STRONGER;
gpio_init(GPIOA, &gpio_init_struct);
/* dac1 and dac2 configuration */
dac_trigger_select(DAC1_SELECT, DAC_SOFTWARE_TRIGGER);
dac_trigger_select(DAC2_SELECT, DAC_SOFTWARE_TRIGGER);
dac_trigger_enable(DAC1_SELECT, TRUE);
dac_trigger_enable(DAC2_SELECT, TRUE);
dac_wave_generate(DAC1_SELECT, DAC_WAVE_GENERATE_NONE);
dac_wave_generate(DAC2_SELECT, DAC_WAVE_GENERATE_NONE);
dac_output_buffer_enable(DAC1_SELECT, TRUE);
dac_output_buffer_enable(DAC2_SELECT, TRUE);
dac_dma_enable(DAC1_SELECT, TRUE);
dac_dma_enable(DAC2_SELECT, TRUE);
/* dma1 channel1 configuration */
dma_reset(DMA1_CHANNEL1);
dma_init_struct.buffer_size = 2;
dma_init_struct.direction = DMA_DIR_MEMORY_TO_PERIPHERAL;
dma_init_struct.memory_base_addr = (uint32_t)dualsquare12bit;
dma_init_struct.memory_data_width = DMA_MEMORY_DATA_WIDTH_WORD;
dma_init_struct.memory_inc_enable = TRUE;
dma_init_struct.peripheral_base_addr = (uint32_t)0x40007420;
dma_init_struct.peripheral_data_width = DMA_PERIPHERAL_DATA_WIDTH_WORD;
dma_init_struct.peripheral_inc_enable = FALSE;
dma_init_struct.priority = DMA_PRIORITY_MEDIUM;
dma_init_struct.loop_mode_enable = TRUE;
dma_init(DMA1_CHANNEL1, &dma_init_struct);
/* enable dma flexible function */
dma_flexible_config(DMA1, FLEX_CHANNEL1, DMA_FLEXIBLE_DAC2);
dma_channel_enable(DMA1_CHANNEL1, TRUE);
/* enable dac1: once the dac1 is enabled, pa.04 is
automatically connected to the dac converter. */
dac_enable(DAC1_SELECT, TRUE);
/* enable dac2: once the dac2 is enabled, pa.05 is
automatically connected to the dac converter. */
dac_enable(DAC2_SELECT, TRUE);
while(1)
{
delay_us(100);
dac_software_trigger_generate(DAC1_SELECT);
dac_software_trigger_generate(DAC2_SELECT);
}
}
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