Other Parts Discussed in Thread: ADS1118
Hello
My customer have some questions about ADS1018,
1.Cann't find address of Conversion Register and Config Register , so how to change Config Register or ready data from Conversion ?
2.Under ADC mode, My customer write Config Register refer to "8.5.7.1 32-Bit Data Transmission Cycle " , but nothing read
3.Transfer to Temperature Sense Mode, also cann't read data
Is there reference code could be provided ? or it have some indispensable setting to make it work normal ? or time sequence ? or initialization
attached is customer's code
#include "ads1018.h"
#include "sys.h"
#include "delay.h"
#include "usart.h"
void SPI1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_7;//enable PB14/15/13
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //setting PB3/4/5 to push-pull mode
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //set GPIO speed
GPIO_Init(GPIOA, &GPIO_InitStructure);//Initical GPIOA
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //���ù���
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7); //PA5/6/7����
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //����SPI�������˫�������ģʽ:SPI����Ϊ˫��˫��ȫ˫��
SPI_InitStructure.SPI_Mode = SPI_Mode_Master; //����SPI����ģʽ:����Ϊ��SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //����SPI�����ݴ�С:SPI���ͽ���8λ֡�ṹ
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //����ͬ��ʱ�ӵĿ���״̬Ϊ�͵�ƽ
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //����ͬ��ʱ�ӵĵڶ��������أ��������½������ݱ�����
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSS�ź���Ӳ����NSS�ܽţ����������ʹ��SSIλ������:�ڲ�NSS�ź���SSIλ����
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8; //���岨����Ԥ��Ƶ��ֵ:������Ԥ��ƵֵΪ256
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB; //ָ�����ݴ����MSBλ����LSBλ��ʼ:���ݴ����MSBλ��ʼ
SPI_InitStructure.SPI_CRCPolynomial = 7; //CRCֵ����Ķ���ʽ
SPI_Init(SPI1, &SPI_InitStructure); //����SPI_InitStruct��ָ���IJ�����ʼ������SPIx�Ĵ���
SPI_Cmd(SPI1, ENABLE); //ʹ��SPI����
ADS1118_ReadVotage(0x62eB);//�������
delay_ms(8);
}
void ADS1118_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE ); //PORTFʱ��ʹ��
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; //PF0 ����
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //�������
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
ADC_CS_High(); //CS���ߣ�����������
SPI1_Init(); //��ʼ��SPI1
SPI1_SetSpeed(SPI_BaudRatePrescaler_8); //����Ϊ--Mʱ��,����ģʽ 9MHZʱ��
}
//SPI �ٶ����ú���
//SpeedSet:
//SPI_BaudRatePrescaler_2 2��Ƶ
//SPI_BaudRatePrescaler_8 8��Ƶ
//SPI_BaudRatePrescaler_16 16��Ƶ
//SPI_BaudRatePrescaler_256 256��Ƶ
void SPI1_SetSpeed(u8 SPI_BaudRatePrescaler)
{
assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler));
SPI1->CR1&=0XFFC7;
SPI1->CR1|=SPI_BaudRatePrescaler; //����SPI1�ٶ�
SPI_Cmd(SPI1,ENABLE);
}
u8 ADS1118_ReadWrite(u8 ConfigReg1)
{
u8 retry=0;
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET) //���ָ����SPI��־λ�������:���ͻ���ձ�־λ
{
retry++;
if(retry>200)return 0;
}
SPI_I2S_SendData(SPI1, ConfigReg1);
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET) //���ָ����SPI��־λ�������:���ܻ���ǿձ�־λ
{
retry++;
if(retry>200)return 0;
}
return SPI_I2S_ReceiveData(SPI1);
}
u32 ADS1118_ReadVotage(u16 ConfigReg) //ADS1118���ã�����16λ�������룬
{
u8 Hbyte=0; //��8λ
u8 Lbyte=0; //��8λ
u8 Hbyte1=0; //��8λ
u8 Lbyte1=0;
// u16 tmp=0; //����
u32 tmp=0;
ADC_CS_Low(); //CS����
delay_us(2); //CS�½���SCK��һ����������Ҫ����100ns
Hbyte= ADS1118_ReadWrite((u8)(ConfigReg>>8));
Lbyte= ADS1118_ReadWrite((u8)ConfigReg);
Hbyte1= ADS1118_ReadWrite((u8)(ConfigReg>>8));
Lbyte1= ADS1118_ReadWrite((u8)ConfigReg);
tmp=((u16)Hbyte<<24)|((u16)Lbyte<<16)|((u16)Hbyte1<<8)|(u16)Lbyte1;
delay_us(2); //CS????????SCK????????100ns
ADC_CS_High(); //CS??,??????
return tmp; //??????
}
