Data transfer to the ADF4350 now works.
This commit is contained in:
IanW
parent
c2c711d049
commit
9db18654f5
1 changed files with 56 additions and 30 deletions
86
main.c
86
main.c
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@ -2,16 +2,17 @@
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#include "regs.h"
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// PA01 - Indicator LED
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// PA02 - ADF4350 LE
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// PA04 - NSS
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// PA05 - SCK
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// PA05 - SCK to ADF4350 CLK
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// PA06 - MISO
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// PA07 - MOSI
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// PA07 - MOSI to ADF4350 DATA
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// PA08 - Test Push Switch
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// PA11 - LD
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// PA11 - ADF4350 LD
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void Delay(uint32_t);
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uint8_t SendReceiveSPIByte(uint32_t);
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void SendSPIData (uint8_t,uint32_t);
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uint16_t SendReceiveSPIData(uint16_t);
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void SendSPIDataADF4350 (uint8_t,uint32_t);
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int main(void)
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{
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@ -19,7 +20,7 @@ int main(void)
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// Below are the ADF4350 settings for a 1 GHz -4dBm output
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uint32_t ar0=0x00500000;
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uint32_t ar1=0x08008011;
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uint32_t ar2=0x00004e42;
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uint32_t ar2=0x00004E42;
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uint32_t ar3=0x000004b3;
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uint32_t ar4=0x00ac8024;
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uint32_t ar5=0x00580005;
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@ -35,12 +36,13 @@ int main(void)
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// I/O
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// PA01 needs to be in push pull mode thus 0 turns on the LED and 1 turns it off (0x2) - Bits
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// PA02 needs to be in open drain mode (0x1)
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// PA04 (SPI NSS) needs to be in alternate push pull mode (0xa) 0b1010
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// PA05 (SPI SCK) needs to be in alternate push pull mode (0xa)
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// PA06 (SPI MISO) is a floating input (0x4)
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// PA07 (SPI MOSI) needs to be in alternate push pull mode (0xa)
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*(uint32_t *)GPIOA_BASE &= 0x0000ff0f;
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*(uint32_t *)GPIOA_BASE |= 0xa4aa0020;
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*(uint32_t *)GPIOA_BASE &= 0x0000f00f;
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*(uint32_t *)GPIOA_BASE |= 0xa4aa0120;
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// PA08 is a push switch input
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// PA11 is a floating input
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*(uint32_t *)(GPIOA_BASE + 0x04) &= 0xffff0ff0;
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@ -55,7 +57,7 @@ int main(void)
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// 14 BIDIOE 0 - output enabled
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// 13 CRCEN 0 - CRC disabled
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// 12 CRCNEXT 0 - No CRC phase
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// 11 DFF 0 - 8 bit data frame
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// 11 DFF 1 - 16 bit data frame
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// 10 RXONLY 0 - Full duplex
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// 09 SSM 0 - Software slave management enabled
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// 08 SSI 0
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@ -66,25 +68,24 @@ int main(void)
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// 01 CPOL 0 - Clock to zero when idle
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// 00 CPHA 0 - First clock transition is the data edge
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*(uint32_t *)(SPI1_BASE) &= 0xffff0000;
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*(uint32_t *)(SPI1_BASE) |= BIT_6 | BIT_5 | BIT_4 | BIT_3 | BIT_2;
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*(uint32_t *)(SPI1_BASE) |= BIT_11 | BIT_6 | BIT_5 | BIT_4 | BIT_3 | BIT_2;
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// Set PA02 (LE) low
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*(uint32_t *)(GPIOA_BASE + 0x14) = BIT_2;
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// Flash the LED to show everything works
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*(uint32_t *)(GPIOA_BASE + 0x14) = BIT_1;
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Delay(500000);
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*(uint32_t *)(GPIOA_BASE + 0x10) = BIT_1;
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Delay(100000);
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while (1)
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{
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// Send the setup data to the synth board
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SendSPIData(0,ar0);
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SendSPIData(1,ar1);
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SendSPIData(2,ar2);
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SendSPIData(3,ar3);
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SendSPIData(4,ar4);
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SendSPIData(5,ar5);
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}
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// Send the setup data to the ADF4350
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SendSPIDataADF4350(5,ar5);
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SendSPIDataADF4350(4,ar4);
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SendSPIDataADF4350(3,ar3);
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SendSPIDataADF4350(2,ar2);
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SendSPIDataADF4350(1,ar1);
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SendSPIDataADF4350(0,ar0);
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// Go into an endless loop waiting for frequency lock to be achieved
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while(1)
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@ -109,14 +110,14 @@ void Delay(uint32_t tmax)
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}
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}
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uint8_t SendReceiveSPIByte(uint32_t value)
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// Send a 16 bit word via SPI1 and receive a 16 bit word at the same time
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uint16_t SendReceiveSPIData(uint16_t value)
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{
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uint8_t lout = 0;
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// Put the 8 bits to be sent into the SPI data register
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// Put the 16 bits to be sent into the SPI data register
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*(uint32_t *)(SPI1_BASE + 0x0c) = value;
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// Read a byte
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uint8_t inbyte = *(uint32_t *)(SPI1_BASE + 0x0c);
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// Read in a 16 bit frame
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uint16_t inbyte = *(uint32_t *)(SPI1_BASE + 0x0c);
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// Loop waiting for the the SPI TXE flag to go high
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while (lout == 0)
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{
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@ -124,14 +125,39 @@ uint8_t SendReceiveSPIByte(uint32_t value)
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uint32_t statusSPI = *(uint32_t *)(SPI1_BASE + 0x08);
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// Just bit 1 the transmit buffer empty flag - wait for this to go high then leave this function
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statusSPI &= BIT_1;
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// The condition has been met so signal to get out of this loop
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if (statusSPI == BIT_1) lout = 1;
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}
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return inbyte;
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}
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void SendSPIData (uint8_t regNo,uint32_t outval)
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// Send a 29 bit register value plus 3 control bits to the ADF4350
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void SendSPIDataADF4350 (uint8_t regNo,uint32_t outval)
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{
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SendReceiveSPIByte(0xa0);
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// Shift the data being sent 3 bits to the left and add the register number
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uint32_t sendword = (outval << 3) + regNo;
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// This then needs splitting into 2 x 16 bit words
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uint16_t highWord = (sendword & 0xffff0000) >> 16;
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uint16_t lowWord = sendword & 0x0000ffff;
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// Send these to the ADF4350 via SPI
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SendReceiveSPIData (highWord);
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SendReceiveSPIData (lowWord);
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uint8_t lout = 0;
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// Loop waiting for the the SPI BSY flag to go low
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while (lout == 0)
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{
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// Read the SPI status register
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uint32_t statusSPI = *(uint32_t *)(SPI1_BASE + 0x08);
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// Just bit 7 the SPI BSY flag - wait for this to go low then leave this function
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statusSPI &= BIT_7;
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// The condition has been met so signal to get out of this loop
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if (statusSPI == 0) lout = 1;
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}
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// Take LE high to load the data into the register
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*(uint32_t *)(GPIOA_BASE + 0x10) = BIT_2;
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// Short delay while LE is high (minimum of 20ns)
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Delay(50);
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// Take LE low again
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*(uint32_t *)(GPIOA_BASE + 0x14) = BIT_2;
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}
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