Connection:
| AD7606 | Connection | Comment |
|---|---|---|
| SCK | STM32-HSPI_SCK | 16Bits, MSB First, Baud Rate <= 20MBits/s, CPOL = High, CPHA = 2 Edge |
| CS | STM32-HSPI-NSS | Hardware NSS output signal |
| CONVST-A | GPIO-OUT-CONVST-A | Could be tied with CONVST-B |
| CONVST-B | GPIO-OUT-CONVST-B | Could be tied with CONVST-A |
| BUSY | GPIO-IN-BUSY | |
| RST | GPIO-OUT-RST | GPIO speed should be low |
| DB7/DOUTA | STM32-HSPI-MISO | |
| DB8/DOUTB | Float | Not support dual line mode now |
| Other data pins | Float | Not support parallel mode now |
| OS[2:0] | GND | We recommend using jumpers to set the over-sampling pins to reduce GPIO consumption |
Implementation:
AD7606_Handler ad7606;
int16_t bufferi[8];
float bufferf[8];
setup()
{
AD7606_Init(&ad7606, &hspi1, AD7606_CONV_GPIO_Port, AD7606_CONV_Pin, AD7606_CONV_GPIO_Port, AD7606_CONV_Pin, AD7606_BUSY_GPIO_Port, AD7606_BUSY_Pin, AD7606_RST_GPIO_Port, AD7606_RST_Pin, Range_10VPP, 2.5);
}
while (1)
{
AD7606_StartReadBytes(&ad7606, bufferi, 8);
AD7606_ConvertToVoltage(&ad7606, bufferi, bufferf, 8);
}
Troubleshooting:
If the AD7606 returns the wrong value, try to lower the GPIO speed.
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