GD32E50x DAC8552 DAC驱动示例
时间: 2023-07-22 15:59:24 浏览: 97
DAC8552驱动程序
你好!以下是一个基于GD32E50x系列微控制器的DAC8552 DAC驱动的示例代码:
```c
#include "gd32e50x.h"
#define DAC8552_CS_PIN GPIO_PIN_4
#define DAC8552_CS_PORT GPIOA
void spi_gpio_init(void)
{
rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_AF);
rcu_periph_clock_enable(RCU_SPI1);
gpio_init(DAC8552_CS_PORT, GPIO_MODE_OUT_PP, GPIO_OSPEED_50MHZ, DAC8552_CS_PIN);
gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7);
}
void spi_config(void)
{
spi_parameter_struct spi_init_struct;
spi_struct_para_init(&spi_init_struct);
spi_init_struct.trans_mode = SPI_TRANSMODE_FULLDUPLEX;
spi_init_struct.device_mode = SPI_MASTER;
spi_init_struct.frame_size = SPI_FRAMESIZE_8BIT;
spi_init_struct.clock_polarity_phase = SPI_CK_PL_HIGH_PH_2EDGE;
spi_init_struct.nss = SPI_NSS_SOFT;
spi_init_struct.prescale = SPI_PSC_256;
spi_init(SPI1, &spi_init_struct);
spi_enable(SPI1);
}
void dac8552_write(uint8_t channel, uint16_t value)
{
uint16_t data = ((channel & 0x01) << 15) | (value & 0x0FFF);
gpio_bit_reset(DAC8552_CS_PORT, DAC8552_CS_PIN);
spi_i2s_data_transmit(SPI1, (data >> 8) & 0xFF);
while(RESET == spi_i2s_flag_get(SPI1, SPI_FLAG_TBE));
spi_i2s_data_transmit(SPI1, data & 0xFF);
while(RESET == spi_i2s_flag_get(SPI1, SPI_FLAG_TBE));
gpio_bit_set(DAC8552_CS_PORT, DAC8552_CS_PIN);
}
int main(void)
{
spi_gpio_init();
spi_config();
while(1)
{
// 设置通道0的输出电压为3.3V
dac8552_write(0, 4095);
delay_1ms(1000);
// 设置通道0的输出电压为0V
dac8552_write(0, 0);
delay_1ms(1000);
}
}
```
这个示例代码使用SPI接口来驱动DAC8552芯片。首先需要初始化SPI的相关GPIO和配置SPI参数。然后通过`dac8552_write`函数来写入DAC芯片的数据,其中`channel`参数表示DAC通道,取值为0或1,`value`参数表示要输出的模拟电压值,取值范围为0-4095。
希望以上示例能对你有帮助!如果你有任何其他问题,请随时提问。
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