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tm4c123_spi.c
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tm4c123_spi.c
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/*
* Copyright (c) 2015 Thomas Roell. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal with the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimers.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimers in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Thomas Roell, nor the names of its contributors
* may be used to endorse or promote products derived from this Software
* without specific prior written permission.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* WITH THE SOFTWARE.
*/
#include "kitty.h"
void tm4c123_spi_initialize(void)
{
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI2);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);
/* Enable pin PB4 for SSI2 SSI2CLK
*/
ROM_GPIOPinConfigure(GPIO_PB4_SSI2CLK);
ROM_GPIOPinTypeSSI(GPIOB_BASE, GPIO_PIN_4);
ROM_GPIOPadConfigSet(GPIOB_BASE, GPIO_PIN_4, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD);
/* Enable pin PB6 for SSI2 SSI2RX
*/
ROM_GPIOPinConfigure(GPIO_PB6_SSI2RX);
ROM_GPIOPinTypeSSI(GPIOB_BASE, GPIO_PIN_6);
ROM_GPIOPadConfigSet(GPIOB_BASE, GPIO_PIN_6, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD_WPU);
/* Enable pin PB7 for SSI2 SSI2TX
*/
ROM_GPIOPinConfigure(GPIO_PB7_SSI2TX);
ROM_GPIOPinTypeSSI(GPIOB_BASE, GPIO_PIN_7);
ROM_GPIOPadConfigSet(GPIOB_BASE, GPIO_PIN_7, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD);
#if (TM4C123_SPI_CONFIG_LEGACY == 0)
/* Enable pin PA3 for GPIOInput (CS_SDCARD)
*/
ROM_GPIOPinTypeGPIOInput(GPIOA_BASE, GPIO_PIN_3);
ROM_GPIOPadConfigSet(GPIOA_BASE, GPIO_PIN_3, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD);
/* Enable pin PA4 for GPIOOutput (CS_TFT)
*/
ROM_GPIOPinTypeGPIOOutput(GPIOA_BASE, GPIO_PIN_4);
ROM_GPIOPadConfigSet(GPIOA_BASE, GPIO_PIN_4, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD);
/* Enable pin PE4 for GPIOOutput
*/
ROM_GPIOPinTypeGPIOOutput(GPIOE_BASE, GPIO_PIN_4);
ROM_GPIOPadConfigSet(GPIOE_BASE, GPIO_PIN_4, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD);
/* Set defaults for CS/DC to H
*/
GPIOA->DATA |= (GPIO_PIN_3 | GPIO_PIN_4);
GPIOE->DATA |= (GPIO_PIN_4);
#else /* TM4C123_SPI_CONFIG_LEGACY == 0 */
/* Enable pin PA3 for GPIOOutput (CS_EEPROM)
*/
ROM_GPIOPinTypeGPIOOutput(GPIOA_BASE, GPIO_PIN_3);
ROM_GPIOPadConfigSet(GPIOA_BASE, GPIO_PIN_3, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD);
/* Enable pin PA4 for GPIOInput (CS_SDCARD)
*/
ROM_GPIOPinTypeGPIOInput(GPIOA_BASE, GPIO_PIN_4);
ROM_GPIOPadConfigSet(GPIOA_BASE, GPIO_PIN_4, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD);
/* Enable pin PB5 for GPIOOutput (CS_TFT)
*/
ROM_GPIOPinTypeGPIOOutput(GPIOB_BASE, GPIO_PIN_5);
ROM_GPIOPadConfigSet(GPIOB_BASE, GPIO_PIN_5, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD);
/* Enable pin PE5 for GPIOOutput (DS_TFT)
*/
ROM_GPIOPinTypeGPIOOutput(GPIOE_BASE, GPIO_PIN_5);
ROM_GPIOPadConfigSet(GPIOE_BASE, GPIO_PIN_5, GPIO_STRENGTH_4MA, GPIO_PIN_TYPE_STD);
/* Set defaults for CS/DC to H
*/
GPIOA->DATA |= (GPIO_PIN_3 | GPIO_PIN_4);
GPIOB->DATA |= (GPIO_PIN_5);
GPIOE->DATA |= (GPIO_PIN_5);
#endif /* TM4C123_SPI_CONFIG_LEGACY == 0 */
/* Initialize slave interfaces.
*/
tm4c123_tft_initialize();
tm4c123_disk_initialize();
}