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--- en:programs_to_communicate_with_the_dds [2016/03/14 14:19]
fwiotte
+++ en:programs_to_communicate_with_the_dds [2016/03/14 14:29] (current)
fwiotte
@@ Line 1: / Line 1: @@
 ===Interface with TI microcontroller: the MSP430===
-Sample program in C written in the microcontroller MSP430F169
+Sample program in C written in the microcontroller MSP430F169 this microcontroller has 2 SPI ports.
-This microcontroller has 2 SPI ports.
 SPI mode: Single-bit serial 2-wire Mode (default mode)
@@ Line 64: / Line 62: @@
     UCTL1 & = ~ SWRST; Initialize USART state machine
   }
-BCSCTL1 | = XTS; and BCSCTL2 | = SELM_3; used to be the fashion HF XTAL MSP430 operate at 8MHz instead of 32KHz default.
+BCSCTL1 | = XTS; and BCSCTL2 | = SELM_3; used to be the HF XTAL MSP430 operate at 8MHz instead of 32KHz default.
            MSP430F169
          -----------------
      / | \ | XIN | -
-      | | | HF XTAL (455k - 8 Mhz)
+       | | | HF XTAL (455k - 8 Mhz)
-      - | RST XOUT | -
+         - | RST XOUT | -
-        | |
+         | |
-        | P5.4 | -> MCLK XTAL =
+           | P5.4 | -> MCLK XTAL =
+According to Mr Buccini Texas Instruments Inc. Feb 2005 Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.21a
+the routine for loading data into SPI mode MSP430F169:
+    write_serial_port void (int instruction, long data, int num_byte)
+    {
+     int i = 0;
+     TXBUF1 = statement;
+      do
+     {
+     TXBUF1 = data >> (num_byte-1-i) * 8;
+     i ++;
+     }
+      while (i <num_byte);
+    }
+===Interface with a TI ARM microcontroller: the TM4C123GH6PM ===
+Example C program written in ARM microcontroller TM4C123GH6PM
+This microcontroller has 4 SPI ports. Default = 80MHz clock
+SPI mode: Single-bit serial 3-wire, the routine for the SPI mode data TM4C123GH6PM ARM:
+   int i = 0;
+   SSI0_DR_R = statement;
+   while (num_byte)
+   {
+      while (! (SSI0_SR_R & SSI_SR_TNF)) {} // SPI0 of TM4C123GH6PM
+      SSI0_DR_R = data >> (num_byte-1-i) * 8;
+      num_byte--;
+   }
+  while (! (SSI0_SR_R & SSI_SR_TNF))
+      {
+        ;
+      }
+The init routine (SPI) for the ARM TM4C123GH6PM:
+   // Enable Peripheral SSI0
+   SysCtlPeripheralEnable (SYSCTL_PERIPH_GPIOA); // Enable GPIO port A SSI0.
+   SysCtlPeripheralEnable (SYSCTL_PERIPH_SSI0);
+   GPIOPinConfigure (GPIO_PA2_SSI0CLK);
+   GPIOPinConfigure (GPIO_PA3_SSI0FSS);
+   GPIOPinConfigure (GPIO_PA5_SSI0TX);
+   GPIOPinTypeSSI (GPIO_PORTA_BASE, GPIO_PIN_5 | GPIO_PIN_3 | GPIO_PIN_2);
+   // GPIOPinTypeSSI (GPIO_PORTA_BASE, GPIO_PIN_5 | GPIO_PIN_2);
+   SSIConfigSetExpClk (SSI0_BASE, SysCtlClockGet () SSI_FRF_MOTO_MODE_0,
+   SSI_MODE_MASTER, 10000000, 8);
+   SSIEnable (SSI0_BASE); // Enable the SSI
+Example of initializing Port B on ARM TM4C123GH6PM:
+   // Void PortB_Init (void)
+   volatile unsigned long delay;
+   SYSCTL_RCGC2_R | = 0x00000002; // 1) activate clock for Port B
+   delay = SYSCTL_RCGC2_R; // Allow for time clock to start
+   GPIO_PORTB_AMSEL_R = 0x00; // 3) disable analog one PB
+   GPIO_PORTB_PCTL_R = 0x00000000; // 4) PCTL GPIO is PB0
+   GPIO_PORTB_DIR_R | = 0xFF; // 5) PB0-PB7 is out
+   // GPIO_PORTB_AFSEL_R & = ~ 0x01; // 6) disable alt funct on PB0
+   GPIO_PORTB_AFSEL_R & = ~ 0xFF; // 6) disable alt funct on PB0-PB7
+   GPIO_PORTB_DEN_R | = 0xFF; // 7) enable digital I / O on PB0-PB7
+Example of initializing a USB-PORT for UART0 serial communication on the ARM TM4C123GH6PM:
+   // Void init_UART0 (void)
+   SysCtlPeripheralEnable (SYSCTL_PERIPH_UART0);
+   SysCtlPeripheralEnable (SYSCTL_PERIPH_GPIOA);
+   GPIOPinConfigure (GPIO_PA0_U0RX);
+   GPIOPinConfigure (GPIO_PA1_U0TX);
+   GPIOPinTypeUART (GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);
+   UARTConfigSetExpClk (UART0_BASE, SysCtlClockGet (), 9600,
+   (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE | UART_CONFIG_PAR_NONE));
+Example of declaration and initialization of the frequency word registers:
+   // // AD9852
+   FTW0_ADRESS int = 0x02;
+   // Unsigned long long FTW0 = 0x17E4B17E4B1; //1.75MHz@300MHz clk
+   unsigned long long FTW0;
+   // Float FTW0 = 0x17E4B17E4B1; //1.75MHz@300MHz clk
+   FTW0_NUM_BYTE int = 0x06;
+   // // AD9858
+   FTW1_ADRESS int = 0x03;
+   unsigned long FTW1 = 0x418937; // @ 1000MHz 1MHz clk
+   FTW1_NUM_BYTE int = 0x04;
+   // // AD9858
+   CFR_ADRESS int = 0x00;
+   unsigned long CFR = 0x79; // MSB first
+   CFR_NUM_BYTE int = 0x04;

ADC First-TF

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