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Data transfer to the ADF4350 now works.

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This commit is contained in:
IanW 2019-06-13 11:14:37 +01:00
parent c2c711d049
commit 9db18654f5
1 changed files with 56 additions and 30 deletions
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86
main.c
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@ -2,16 +2,17 @@
#include "regs.h" #include "regs.h"
// PA01 - Indicator LED // PA01 - Indicator LED
// PA02 - ADF4350 LE
// PA04 - NSS // PA04 - NSS
// PA05 - SCK // PA05 - SCK to ADF4350 CLK
// PA06 - MISO // PA06 - MISO
// PA07 - MOSI // PA07 - MOSI to ADF4350 DATA
// PA08 - Test Push Switch // PA08 - Test Push Switch
// PA11 - LD // PA11 - ADF4350 LD
void Delay(uint32_t); void Delay(uint32_t);
uint8_t SendReceiveSPIByte(uint32_t); uint16_t SendReceiveSPIData(uint16_t);
void SendSPIData (uint8_t,uint32_t); void SendSPIDataADF4350 (uint8_t,uint32_t);
int main(void) int main(void)
{ {
@ -19,7 +20,7 @@ int main(void)
// Below are the ADF4350 settings for a 1 GHz -4dBm output // Below are the ADF4350 settings for a 1 GHz -4dBm output
uint32_t ar0=0x00500000; uint32_t ar0=0x00500000;
uint32_t ar1=0x08008011; uint32_t ar1=0x08008011;
uint32_t ar2=0x00004e42; uint32_t ar2=0x00004E42;
uint32_t ar3=0x000004b3; uint32_t ar3=0x000004b3;
uint32_t ar4=0x00ac8024; uint32_t ar4=0x00ac8024;
uint32_t ar5=0x00580005; uint32_t ar5=0x00580005;
@ -35,12 +36,13 @@ int main(void)
// I/O // I/O
// PA01 needs to be in push pull mode thus 0 turns on the LED and 1 turns it off (0x2) - Bits // PA01 needs to be in push pull mode thus 0 turns on the LED and 1 turns it off (0x2) - Bits
// PA02 needs to be in open drain mode (0x1)
// PA04 (SPI NSS) needs to be in alternate push pull mode (0xa) 0b1010 // PA04 (SPI NSS) needs to be in alternate push pull mode (0xa) 0b1010
// PA05 (SPI SCK) needs to be in alternate push pull mode (0xa) // PA05 (SPI SCK) needs to be in alternate push pull mode (0xa)
// PA06 (SPI MISO) is a floating input (0x4) // PA06 (SPI MISO) is a floating input (0x4)
// PA07 (SPI MOSI) needs to be in alternate push pull mode (0xa) // PA07 (SPI MOSI) needs to be in alternate push pull mode (0xa)
*(uint32_t *)GPIOA_BASE &= 0x0000ff0f; *(uint32_t *)GPIOA_BASE &= 0x0000f00f;
*(uint32_t *)GPIOA_BASE |= 0xa4aa0020; *(uint32_t *)GPIOA_BASE |= 0xa4aa0120;
// PA08 is a push switch input // PA08 is a push switch input
// PA11 is a floating input // PA11 is a floating input
*(uint32_t *)(GPIOA_BASE + 0x04) &= 0xffff0ff0; *(uint32_t *)(GPIOA_BASE + 0x04) &= 0xffff0ff0;
@ -55,7 +57,7 @@ int main(void)
// 14 BIDIOE 0 - output enabled // 14 BIDIOE 0 - output enabled
// 13 CRCEN 0 - CRC disabled // 13 CRCEN 0 - CRC disabled
// 12 CRCNEXT 0 - No CRC phase // 12 CRCNEXT 0 - No CRC phase
// 11 DFF 0 - 8 bit data frame // 11 DFF 1 - 16 bit data frame
// 10 RXONLY 0 - Full duplex // 10 RXONLY 0 - Full duplex
// 09 SSM 0 - Software slave management enabled // 09 SSM 0 - Software slave management enabled
// 08 SSI 0 // 08 SSI 0
@ -66,25 +68,24 @@ int main(void)
// 01 CPOL 0 - Clock to zero when idle // 01 CPOL 0 - Clock to zero when idle
// 00 CPHA 0 - First clock transition is the data edge // 00 CPHA 0 - First clock transition is the data edge
*(uint32_t *)(SPI1_BASE) &= 0xffff0000; *(uint32_t *)(SPI1_BASE) &= 0xffff0000;
*(uint32_t *)(SPI1_BASE) |= BIT_6 | BIT_5 | BIT_4 | BIT_3 | BIT_2; *(uint32_t *)(SPI1_BASE) |= BIT_11 | BIT_6 | BIT_5 | BIT_4 | BIT_3 | BIT_2;
// Set PA02 (LE) low
*(uint32_t *)(GPIOA_BASE + 0x14) = BIT_2;
// Flash the LED to show everything works // Flash the LED to show everything works
*(uint32_t *)(GPIOA_BASE + 0x14) = BIT_1; *(uint32_t *)(GPIOA_BASE + 0x14) = BIT_1;
Delay(500000); Delay(500000);
*(uint32_t *)(GPIOA_BASE + 0x10) = BIT_1; *(uint32_t *)(GPIOA_BASE + 0x10) = BIT_1;
Delay(100000); Delay(100000);
// Send the setup data to the ADF4350
while (1) SendSPIDataADF4350(5,ar5);
{ SendSPIDataADF4350(4,ar4);
// Send the setup data to the synth board SendSPIDataADF4350(3,ar3);
SendSPIData(0,ar0); SendSPIDataADF4350(2,ar2);
SendSPIData(1,ar1); SendSPIDataADF4350(1,ar1);
SendSPIData(2,ar2); SendSPIDataADF4350(0,ar0);
SendSPIData(3,ar3);
SendSPIData(4,ar4);
SendSPIData(5,ar5);
}
// Go into an endless loop waiting for frequency lock to be achieved // Go into an endless loop waiting for frequency lock to be achieved
while(1) while(1)
@ -109,14 +110,14 @@ void Delay(uint32_t tmax)
} }
} }
uint8_t SendReceiveSPIByte(uint32_t value) // Send a 16 bit word via SPI1 and receive a 16 bit word at the same time
uint16_t SendReceiveSPIData(uint16_t value)
{ {
uint8_t lout = 0; uint8_t lout = 0;
// Put the 8 bits to be sent into the SPI data register // Put the 16 bits to be sent into the SPI data register
*(uint32_t *)(SPI1_BASE + 0x0c) = value; *(uint32_t *)(SPI1_BASE + 0x0c) = value;
// Read a byte // Read in a 16 bit frame
uint8_t inbyte = *(uint32_t *)(SPI1_BASE + 0x0c); uint16_t inbyte = *(uint32_t *)(SPI1_BASE + 0x0c);
// Loop waiting for the the SPI TXE flag to go high // Loop waiting for the the SPI TXE flag to go high
while (lout == 0) while (lout == 0)
{ {
@ -124,14 +125,39 @@ uint8_t SendReceiveSPIByte(uint32_t value)
uint32_t statusSPI = *(uint32_t *)(SPI1_BASE + 0x08); uint32_t statusSPI = *(uint32_t *)(SPI1_BASE + 0x08);
// Just bit 1 the transmit buffer empty flag - wait for this to go high then leave this function // Just bit 1 the transmit buffer empty flag - wait for this to go high then leave this function
statusSPI &= BIT_1; statusSPI &= BIT_1;
// The condition has been met so signal to get out of this loop
if (statusSPI == BIT_1) lout = 1; if (statusSPI == BIT_1) lout = 1;
} }
return inbyte; return inbyte;
} }
void SendSPIData (uint8_t regNo,uint32_t outval) // Send a 29 bit register value plus 3 control bits to the ADF4350
void SendSPIDataADF4350 (uint8_t regNo,uint32_t outval)
{ {
SendReceiveSPIByte(0xa0); // Shift the data being sent 3 bits to the left and add the register number
uint32_t sendword = (outval << 3) + regNo;
// This then needs splitting into 2 x 16 bit words
uint16_t highWord = (sendword & 0xffff0000) >> 16;
uint16_t lowWord = sendword & 0x0000ffff;
// Send these to the ADF4350 via SPI
SendReceiveSPIData (highWord);
SendReceiveSPIData (lowWord);
uint8_t lout = 0;
// Loop waiting for the the SPI BSY flag to go low
while (lout == 0)
{
// Read the SPI status register
uint32_t statusSPI = *(uint32_t *)(SPI1_BASE + 0x08);
// Just bit 7 the SPI BSY flag - wait for this to go low then leave this function
statusSPI &= BIT_7;
// The condition has been met so signal to get out of this loop
if (statusSPI == 0) lout = 1;
}
// Take LE high to load the data into the register
*(uint32_t *)(GPIOA_BASE + 0x10) = BIT_2;
// Short delay while LE is high (minimum of 20ns)
Delay(50);
// Take LE low again
*(uint32_t *)(GPIOA_BASE + 0x14) = BIT_2;
} }