#include "ADS8689.h"
#include <stdio.h>
#include "delay.h"
//初始化ADS8689，并且检验读入寄存器数据和写入的是否一样
//返回TURE则说明初始化正常，否则错误
uint8_t receive[4] = {0};
#ifdef SOFT_ADC
void ADS8689_Init(void)
{
GPIO_SetMode(PD, BIT0 | BIT1 | BIT3 | BIT4, GPIO_PMD_OUTPUT);
GPIO_SetMode(PD, BIT2, GPIO_PMD_INPUT);
ADS8689_CS = 1;
ADS8689_SCLK = 0;
ADS8689_SDIN = 1;
ADS8689_RST = 0;
delay_ms(10);
ADS8689_RST = 1;
delay_ms(10);
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0040); // 外部双极性24.576
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0041); // 双极性20.48
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0042); // 双极性12.889
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0043); // 双极性10.24
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0044); // 双极性5.12
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0048); // 单极性12.889
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0049); // 单极性10.24
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x004A); // 单极性6.144
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x004B); // 单极性5.12
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0000); // 内部双极性24.576
ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0001); // 双极性20.48
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0002); // 双极性12.889
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0003); // 双极性10.24
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0004); // 双极性5.12
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0008); // 单极性12.889
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x0009); // 单极性10.24
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x000A); // 单极性6.144
// ADS8689_ReadWrite(ADS8689_WRITE_FULL, ADS8689_RANGE_SEL_REG, 0x000B); // 单极性5.12
}
uint8_t *ADS8689_ReadWrite(uint8_t command, uint8_t address, uint16_t data)
{
uint8_t buff[4] = {0};
uint8_t rece_byte = 0;
uint8_t i = 0, j = 0, byte = 0;
buff[0] = (command << 1);
buff[1] = address;
buff[2] = ((data >> 8) & 0xff);
buff[3] = (data & 0xff);
ADS8689_CS = 0;
delay_us(1);
for (i = 0; i < 4; i++)
{
byte = buff[i];
for (j = 0; j < 8; j++)
{
// rece_byte = 0;
if(byte & 0x80)
{
ADS8689_SDIN = 1;
}
else
{
ADS8689_SDIN = 0;
}
byte <<= 1;
delay_us(1);
ADS8689_SCLK = 1;
rece_byte <<= 1;
rece_byte |= ADS8689_SDO;
delay_us(1);
ADS8689_SCLK = 0;
}
receive[i] = rece_byte;
}
ADS8689_SCLK = 0;
ADS8689_CS = 1;
delay_us(1);
return receive;
}
#else
void ADS8689_Init(void)
{
/* Select HCLK as the clock source of SPI0 */
CLK_SetModuleClock(SPI2_MODULE, CLK_CLKSEL1_SPI2_S_HCLK, MODULE_NoMsk);
/* Enable SPI0 peripheral clock */
CLK_EnableModuleClock(SPI2_MODULE);
/* Setup SPI0 multi-function pins */
SYS->GPD_MFP &= ~(SYS_GPD_MFP_PD0_Msk | SYS_GPD_MFP_PD1_Msk | SYS_GPD_MFP_PD2_Msk | SYS_GPD_MFP_PD3_Msk);
SYS->GPD_MFP |= SYS_GPD_MFP_PD0_SPI2_SS0 | SYS_GPD_MFP_PD1_SPI2_CLK | SYS_GPD_MFP_PD2_SPI2_MISO0 | SYS_GPD_MFP_PD3_SPI2_MOSI0;
SYS->ALT_MFP &= ~(SYS_ALT_MFP_PD0_Msk | SYS_ALT_MFP_PD1_Msk | SYS_ALT_MFP_PD2_Msk | SYS_ALT_MFP_PD3_Msk);
SYS->ALT_MFP |= SYS_ALT_MFP_PD0_SPI2_SS0 | SYS_ALT_MFP_PD1_SPI2_CLK | SYS_ALT_MFP_PD2_SPI2_MISO0 | SYS_ALT_MFP_PD3_SPI2_MOSI0;
SPI_Open(SPI2, SPI_MASTER, SPI_MODE_0, 8, 2000000);
SPI_EnableAutoSS(SPI2, SPI_SS0, SPI_SS_ACTIVE_LOW);
}
void ADS8689_Write(uint8_t command, uint16_t address, uint16_t data)
{
int timeout = 10000;
uint8_t buf[4] = {0};
uint8_t i = 0, j = 0, byte = 0;
buf[0] = (command << 1) | ((address >> 8) & 1);
buf[1] = (address & 0xFF);
buf[2] = ((data >> 8) & 0xFF);
buf[3] = (data & 0xFF);
for (int i = 0; i < 4; i++)
{
SPI_WRITE_TX0(SPI2, buf[i]);
SPI_TRIGGER(SPI2); // 没有使用FIFO就需要使用此句
while (SPI_IS_BUSY(SPI2)) // 等待发送完成
{
if(timeout--){}
else break;
}
}
}
#endif
