f44979bf75
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
140 lines
4.3 KiB
C
140 lines
4.3 KiB
C
// -----------------------------------------------------------------------------
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/// @file MAX5715.c
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/// @brief Description
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// -----------------------------------------------------------------------------
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// Micro-Key bv
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// Industrieweg 28, 9804 TG Noordhorn
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// Postbus 92, 9800 AB Zuidhorn
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// The Netherlands
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// Tel: +31 594 503020
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// Fax: +31 594 505825
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// Email: support@microkey.nl
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// Web: www.microkey.nl
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// -----------------------------------------------------------------------------
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/// $Revision$
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/// $Author$
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/// $Date$
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// (c) 2017 Micro-Key bv
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// -----------------------------------------------------------------------------
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/// @file MAX5715.c
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/// @ingroup {group_name}
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// -----------------------------------------------------------------------------
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// Include files
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// -----------------------------------------------------------------------------
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#include "Logger.h"
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#include "MAX5715.h"
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#include "spi.h"
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// -----------------------------------------------------------------------------
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// Constant and macro definitions
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// Type definitions
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// File-scope variables
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// Function declarations
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// -----------------------------------------------------------------------------
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// -----------------------------------------------------------------------------
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// Function definitions
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// -----------------------------------------------------------------------------
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ErrorStatus MAX5715_construct(struct MAX5715* self, const struct IODevice* device)
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{
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ErrorStatus returnValue = SUCCESS;
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int loopCounter;
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if (self != NULL)
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{
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self->device = device;
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for (loopCounter = 0; loopCounter < MAX5715_NUMBER_OF_DACS; loopCounter++)
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{
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self->dac[loopCounter].id = loopCounter;
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self->dac[loopCounter].value = 0x0000;
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}
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}
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else
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{
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returnValue = ERROR;
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}
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return returnValue;
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}
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void MAX5715_destruct(struct MAX5715* self)
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{
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self->device = NULL;
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}
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ErrorStatus MAX5715_getSpiParameters(struct SpiParameters* parameters)
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{
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ErrorStatus returnValue = SUCCESS;
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if ((configCPU_CLOCK_HZ / 2) < MAX5715_SPI_MAX_CLK_HZ)
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{
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parameters->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
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}
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else if ((configCPU_CLOCK_HZ / 4) < MAX5715_SPI_MAX_CLK_HZ)
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{
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parameters->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
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}
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else if ((configCPU_CLOCK_HZ / 8) < MAX5715_SPI_MAX_CLK_HZ)
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{
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parameters->SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
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}
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else
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{
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// The CPU clock is too high. The pre-scaler has a max of 256. A clock higher than 25,6 MHz
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// results in a SPI CLK higher than 100 kHz, which is the max of the display
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returnValue = ERROR;
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}
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if (returnValue == SUCCESS)
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{
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// SPI pre-scaler was no problem - assign the remaining parameters
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parameters->SPI_CPHA = MAX5715_SPI_CPHA;
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parameters->SPI_CPOL = MAX5715_SPI_CPOL;
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parameters->SPI_CRCPolynomial = MAX5715_SPI_CRCPolynomial;
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parameters->SPI_DataSize = MAX5715_SPI_DataSize;
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parameters->SPI_Direction = MAX5715_SPI_Direction;
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parameters->SPI_FirstBit = MAX5715_SPI_FirstBit;
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parameters->SPI_Mode = MAX5715_SPI_Mode;
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parameters->SPI_NSS = MAX5715_SPI_NSS;
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parameters->SPI_NSS_internal = MAX5715_SPI_NSS_INTERNAL;
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parameters->rxQueueSize = MAX5715_SPI_RX_QUEUE;
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parameters->txQueueSize = MAX5715_SPI_TX_QUEUE;
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}
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return returnValue;
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}
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ErrorStatus MAX5715_sendCommand(const struct MAX5715* self, uint8_t command, uint16_t data)
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{
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char buffer[3] = {(char)command, (char)(data >> 4), (char)((data << 4) & 0x00F0)};
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return IODevice_write(self->device, buffer, 3);
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}
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