Hello, I am Han Tae Soo.
I am searching for source code about AD7124-4 A/D Converter in DSP( TMS320F28027) environment as you mention how to use AD7124-4 in STM32 web page( https://wiki.analog.com/resources/tools-software/product-support-software/ad7124-stm32 ).
Could you send me source code whitch is initializing and sending measured data via SPI communication?
Especially I want to attain source code how to use 7124-4 chip step by step measuring A/D data (reading and writing AD data with SPI communication).
I want to know how to use registers of initializing and measuring, sending datas via SPI communication.
I want full sour codes. Please send me it via e-mail.
My E-mail is hts2046@naver.com and hts2046@daum.net.
I wrote down as bellows but MISO of SPI communication from AD7124-4 which does not reply.
//=======================================================================================================================
void main(void)
{
uint16_t sdata, rdata;
------------
spia_init(); // SPI baudrate is set to 2.5MHz as ad7124_app_initialize in ad7124_console_app.c
sdata = 0x0000;
ad7124_app_initialize(AD7124_CONFIG_A); // AD7124_CONFIG_A = 0 . Initialize --- (1)
sdata = AD7124_COMM_REG_WEN | AD7124_COMM_REG_WR | AD7124_ADC_CTRL_REG;
// Select control register --- (2)
SPI_write(mySpi, sdata); // this code is used in DSP of default mode
sdata = 0x0000;
sdata = AD7124_ADC_CTRL_REG_REF_EN | AD7124_ADC_CTRL_REG_POWER_MODE(0x2) | AD7124_ADC_CTRL_REG_MODE(0x1) | AD7124_ADC_CTRL_REG_CLK_SEL(0x0);
// Internal Ref. enable, Full Power Mode, Single Conversion, Internal 614.4KHz clock with not available CLK pin. Set control register contents.. --- (3)
SPI_write(mySpi, sdata); // mySpi is SPI handle. Write Control register to AD7124-4 via SPI comm.
sdata = 0x0000;
sdata = AD7124_COMM_REG_WEN | AD7124_COMM_REG_WR | AD7124_IO_CTRL1_REG;
// Select I/O control_1 register --- (4)
SPI_write(mySpi, sdata);
sdata = 0x0000;
sdata =AD7124_IO_CTRL1_REG_IOUT1(0x0) | AD7124_IO_CTRL1_REG_IOUT0(0x0) | AD7124_IO_CTRL1_REG_IOUT_CH1(0x2) | AD7124_IO_CTRL1_REG_IOUT_CH0(0x2);
// IOut1/2=off, IOUT1/2_ch : reserved. Set I/O control_1 register --- (5)
SPI_write(mySpi, sdata);
sdata = 0x0000;
sdata = AD7124_COMM_REG_WEN | AD7124_COMM_REG_WR | AD7124_IO_CTRL2_REG;
// Select I/O control_2 register --- (6)
SPI_write(mySpi, sdata);
sdata = 0x0000;
sdata = AD7124_IO_CTRL2_REG_GPIO_VBIAS0; // Bias 0 to channel0. Set I/O control_2 register --- (7)
SPI_write(mySpi, sdata);
sdata = 0x0000;
sdata = AD7124_COMM_REG_WEN | AD7124_COMM_REG_WR | AD7124_CH0_MAP_REG;
// Communication enable, write enable, Channel0. Select channel0 --- (8)
SPI_write(mySpi, sdata);
sdata = 0x00000;
sdata = AD7124_CH_MAP_REG_CH_ENABLE | AD7124_CH_MAP_REG_SETUP(0x0) | AD7124_CH_MAP_REG_AINP(0x0) | AD7124_CH_MAP_REG_AINM(0x01);
// Channel 0 enable, setupl=0, AINP=0, AINM= 1. Set Channel 0 --- (9)
// AIN0 is positive and AIN1 is negative of channel 0.
SPI_write(mySpi, sdata);
for (; ; )
{
sdata = 0x0000;
sdata = AD7124_COMM_REG_WEN | AD7124_COMM_REG_RD | AD7124_DATA_REG;
// Select Data register --- (10)
SPI_write(mySpi, sdata);
rdata = SPI_read(mySpi); // Data read.. but MISO of SPI do not reply.. MISO value is always 0.
delay_loop(); // 1ms delay..
}
}
//=======================================================================================================================
I am sorry that source code is too long.
I am referred to sour code ( https://wiki.analog.com/_media/resources/tools-software/product-support-software/ad7124_example/ad7124_stm32_example.zip) but I can not find out fault point of no reply from AD7124-4 SPI (MISO).
I want to know how to initialize and transfer A/D data to Processor (DSP) via SPI communication, So I need real source code or sequence of programming.
I am appreciate at your comment.
Thank you.
Tae Soo, Han
