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Continued work on MAX5715. MACRO functions are done, mostly tested in logic analyzer. SPI unable to work with hardware SS, so software SS is used instead

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Added UART3 on PB10/PB11 for terminal (future use)

git-svn-id: https://svn.vbchaos.nl/svn/hsb/trunk@225 05563f52-14a8-4384-a975-3d1654cca0fa
This commit is contained in:
mmi
2017-09-29 14:42:38 +00:00
parent b56bc71f36
commit f44979bf75
15 changed files with 412 additions and 95 deletions
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84
S - Software/0 - HSB MRTS Kathode-MCP/3 - Implementation/0 - Code/HAL/src/MAX5715.c
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@@ -25,7 +25,11 @@
// Include files
// -----------------------------------------------------------------------------
#include "Logger.h"
#include "MAX5715.h"
#include "spi.h"
// -----------------------------------------------------------------------------
// Constant and macro definitions
@@ -53,3 +57,83 @@
// -----------------------------------------------------------------------------
// Function definitions
// -----------------------------------------------------------------------------
ErrorStatus MAX5715_construct(struct MAX5715* self, const struct IODevice* device)
{
ErrorStatus returnValue = SUCCESS;
int loopCounter;
if (self != NULL)
{
self->device = device;
for (loopCounter = 0; loopCounter < MAX5715_NUMBER_OF_DACS; loopCounter++)
{
self->dac[loopCounter].id = loopCounter;
self->dac[loopCounter].value = 0x0000;
}
}
else
{
returnValue = ERROR;
}
return returnValue;
}
void MAX5715_destruct(struct MAX5715* self)
{
self->device = NULL;
}
ErrorStatus MAX5715_getSpiParameters(struct SpiParameters* parameters)
{
ErrorStatus returnValue = SUCCESS;
if ((configCPU_CLOCK_HZ / 2) < MAX5715_SPI_MAX_CLK_HZ)
{
parameters->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
}
else if ((configCPU_CLOCK_HZ / 4) < MAX5715_SPI_MAX_CLK_HZ)
{
parameters->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
}
else if ((configCPU_CLOCK_HZ / 8) < MAX5715_SPI_MAX_CLK_HZ)
{
parameters->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
}
else
{
// The CPU clock is too high. The pre-scaler has a max of 256. A clock higher than 25,6 MHz
// results in a SPI CLK higher than 100 kHz, which is the max of the display
returnValue = ERROR;
}
if (returnValue == SUCCESS)
{
// SPI pre-scaler was no problem - assign the remaining parameters
parameters->SPI_CPHA = MAX5715_SPI_CPHA;
parameters->SPI_CPOL = MAX5715_SPI_CPOL;
parameters->SPI_CRCPolynomial = MAX5715_SPI_CRCPolynomial;
parameters->SPI_DataSize = MAX5715_SPI_DataSize;
parameters->SPI_Direction = MAX5715_SPI_Direction;
parameters->SPI_FirstBit = MAX5715_SPI_FirstBit;
parameters->SPI_Mode = MAX5715_SPI_Mode;
parameters->SPI_NSS = MAX5715_SPI_NSS;
parameters->SPI_NSS_internal = MAX5715_SPI_NSS_INTERNAL;
parameters->rxQueueSize = MAX5715_SPI_RX_QUEUE;
parameters->txQueueSize = MAX5715_SPI_TX_QUEUE;
}
return returnValue;
}
ErrorStatus MAX5715_sendCommand(const struct MAX5715* self, uint8_t command, uint16_t data)
{
char buffer[3] = {(char)command, (char)(data >> 4), (char)((data << 4) & 0x00F0)};
return IODevice_write(self->device, buffer, 3);
}