General • Re: Problems with SPI Interface

Code:

import machineimport utimeimport ustructimport sysimport array as arr############################################################################# Settings# Assign chip select (CS) pin (and start it high)cs = machine.Pin(17, machine.Pin.OUT)ce = machine.Pin(13, machine.Pin.OUT)# Initialize SPIspi = machine.SPI(0,                  baudrate=1000000,                  polarity=1,                  phase=0,                  bits=8,                  firstbit=machine.SPI.MSB,                  sck=machine.Pin(18),                  mosi=machine.Pin(19),                  miso=machine.Pin(16))################################################################################ Functionsdef reg_write(spi, cs, data):    """    Write 1 byte to the specified register.    """        # Construct message (set ~W bit low, MB bit low)    msg = bytearray()    msg.append((data >> 16) & 0x7F)    msg.append((data >> 8) & 0xFF)    msg.append(data & 0xFF)        # Send out SPI message    cs.value(0)    spi.write(msg)    cs.value(1)    ################################################################################ Mainregisters = arr.array('I', [0x7D2288,0x7C0000,0x7B0000,0x7A0000,0x790000,0x780000,0x770000,0x760000,0x750000,0x740000,0x730000,0x727802,0x710000,0x700000,0x6F0000,0x6E0000,0x6D0000,0x6C0000,0x6B0000,0x6A0007,0x694440,0x682710,0x670000,0x660000,0x650000,0x642710,0x630000,0x620000,0x610000,0x600000,0x5F0000,0x5E0000,0x5D0000,0x5C0000,0x5B0000,0x5A0000,0x590000,0x580000,0x570000,0x560000,0x55D800,0x540001,0x530000,0x522800,0x510000,0x50CCCC,0x4F004C,0x4E0001,0x4D0000,0x4C000C,0x4B0840,0x4A0000,0x49003F,0x480001,0x470081,0x46C350,0x450000,0x4403E8,0x430000,0x4201F4,0x410000,0x401388,0x3F0000,0x3E00AF,0x3D00A8,0x3C03E8,0x3B0001,0x3A9001,0x390020,0x380000,0x370000,0x360000,0x350000,0x340421,0x330080,0x320080,0x314180,0x3003E0,0x2F0300,0x2E07F0,0x2DC61F,0x2C1FA3,0x2B0000,0x2A0000,0x290000,0x280000,0x2703E8,0x260000,0x250305,0x24003C,0x230004,0x220010,0x211E01,0x2005BF,0x1FC3E6,0x1E18A6,0x1D0000,0x1C0488,0x1B0002,0x1A0808,0x190624,0x18071A,0x17007C,0x160001,0x150409,0x144848,0x1327B7,0x120064,0x110096,0x100080,0x0F060E,0x0E1820,0x0D4000,0x0C5001,0x0BB018,0x0A10F8,0x090004,0x082000,0x0700B2,0x06C802,0x0530C8,0x040A43,0x030782,0x020500,0x010808,0x00211C])# Start CS pin highcs.value(1)ce.value(1)for x in registers:    reg_write(spi, cs, x)                    

Code:

  #include <stdio.h>  #include <string.h>  #include <stdlib.h>  #include <stdint.h>  #include "pico/stdlib.h"  #include "hardware/spi.h"  #include "pico/binary_info.h"  // SPI Defines  // We are going to use SPI 0, and allocate it to the following GPIO pins  // Pins can be changed, see the GPIO function select table in the datasheet for information on GPIO assignments  #define SPI_PORT spi0  #define PIN_MISO 16  #define PIN_CS   17  #define PIN_SCK  18  #define PIN_MOSI 19  //defines other ports  #define RAMPCLK 20  #define RAMPDIR 21  #define SYNC 22  #define CE 13  #define Lines 126 //Defines amount of lines in HexRegisters.txt  #define LengthOfData 15 //Defines max length of string  int main()  {      // set of register values to test with programming      uint32_t Data[126] = {0x7D2288,  0x7C0000,  0x7B0000,  0x7A0000,  0x790000,  0x780000,  0x770000,  0x760000,  0x750000,  0x740000,  0x730000,  0x727802,  0x710000,  0x700000,  0x6F0000,  0x6E0000,  0x6D0000,  0x6C0000,  0x6B0000,  0x6A0007,  0x694440,  0x680000,  0x670000,  0x660000,  0x650000,  0x640000,  0x630000,  0x620000,  0x610000,  0x600000,  0x5F0000,  0x5E0000,  0x5D0000,  0x5C0000,  0x5B0000,  0x5A0000,  0x590000,  0x580000,  0x570000,  0x560000,  0x550000,  0x540000,  0x530000,  0x520000,  0x510000,  0x500000,  0x4F0000,  0x4E0001,  0x4D0000,  0x4C000C,  0x4B0800,  0x4A0000,  0x49003F,  0x480001,  0x470081,  0x46C350,  0x450000,  0x4403E8,  0x430000,  0x4201F4,  0x410000,  0x401388,  0x3F0000,  0x3E00AF,  0x3D00A8,  0x3C03E8,  0x3B0001,  0x3A9001,  0x390020,  0x380000,  0x370000,  0x360000,  0x350000,  0x340421,  0x330080,  0x320080,  0x314180,  0x3003E0,  0x2F0300,  0x2E07F0,  0x2DC61F,  0x2C1FA3,  0x2B0000,  0x2A0000,  0x290000,  0x280000,  0x2703E8,  0x260000,  0x250305,  0x24003C,  0x230004,  0x220010,  0x211E01,  0x2005BF,  0x1FC3E6,  0x1E18A6,  0x1D0000,  0x1C0488,  0x1B0002,  0x1A0808,  0x190624,  0x18071A,  0x17007C,  0x160001,  0x150409,  0x144848,  0x1327B7,  0x120064,  0x110096,  0x100080,  0x0F060E,  0x0E1820,  0x0D4000,  0x0C5001,  0x0BB018,  0x0A10F8,  0x090004,  0x082000,  0x0700B2,  0x06C802,  0x0530C8,  0x040A43,  0x030782,  0x020500,  0x010808,  0x00211C,  };      stdio_init_all();      gpio_init(PIN_CS);      gpio_set_dir(PIN_CS, GPIO_OUT);      gpio_put(PIN_CS, 1);      // SPI initialisation. This example will use SPI at 40MHz.      spi_init(SPI_PORT,1000*1000);      spi_set_format(SPI_PORT, 8, SPI_CPOL_1, SPI_CPHA_0, SPI_MSB_FIRST);      gpio_set_function(PIN_MISO, GPIO_FUNC_SPI);      gpio_set_function(PIN_SCK,  GPIO_FUNC_SPI);      gpio_set_function(PIN_MOSI, GPIO_FUNC_SPI);      int length = sizeof(SPI_PORT);      memset(SPI_PORT, 0, length);      gpio_set_drive_strength(PIN_SCK, GPIO_DRIVE_STRENGTH_12MA);      gpio_set_drive_strength(PIN_MOSI, GPIO_DRIVE_STRENGTH_12MA);      // Chip select is active-low, so we'll initialise it to a driven-high state      gpio_init(RAMPCLK);      gpio_init(RAMPDIR);      gpio_init(SYNC);      gpio_set_dir(RAMPCLK, GPIO_OUT);      gpio_set_dir(RAMPDIR, GPIO_OUT);      gpio_set_dir(SYNC, GPIO_OUT);      gpio_put(RAMPCLK, 0);      gpio_put(RAMPDIR, 0);      gpio_put(SYNC, 0);      gpio_init(CE);      gpio_set_dir(CE, GPIO_OUT);      gpio_put(CE, 1);      sleep_us(500);      uint32_t R125data = Data[0];      uint8_t R125value[3];      R125value[0] = (R125data >> 16) & 0x7F;      R125value[1] = (R125data >> 8) & 0xFF;      R125value[2] = R125data & 0xFF;      gpio_put(PIN_CS, 0);      spi_write_blocking(SPI_PORT, R125value, 3);      gpio_put(PIN_CS, 1);      for (int i = 1; i < 126; i++) {        uint32_t ROthersData = Data[i];        uint8_t ROtherValue[3];        ROtherValue[0] = (R125data >> 16) & 0x7F;        ROtherValue[0] = (ROthersData >> 8) & 0xFF;        ROtherValue[1] = ROthersData & 0xFF;        gpio_put(PIN_CS, 0);        spi_write_blocking(SPI_PORT, ROtherValue, 3);        gpio_put(PIN_CS, 1);      }      gpio_put(PIN_CS, 1);      //Should have an output signal with 3000 MHz  }