These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
Diff: SPI/Master/spi_master.c
- Revision:
- 0:bf7b9fba3924
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SPI/Master/spi_master.c Sun Mar 20 05:38:56 2011 +0000 @@ -0,0 +1,299 @@ +/***********************************************************************//** + * @file spi_master.c + * @purpose This example describes how to use SPI in master mode + * @version 2.0 + * @date 21. May. 2010 + * @author NXP MCU SW Application Team + *--------------------------------------------------------------------- + * Software that is described herein is for illustrative purposes only + * which provides customers with programming information regarding the + * products. This software is supplied "AS IS" without any warranties. + * NXP Semiconductors assumes no responsibility or liability for the + * use of the software, conveys no license or title under any patent, + * copyright, or mask work right to the product. NXP Semiconductors + * reserves the right to make changes in the software without + * notification. NXP Semiconductors also make no representation or + * warranty that such application will be suitable for the specified + * use without further testing or modification. + **********************************************************************/ +#include "lpc17xx_spi.h" +#include "lpc17xx_libcfg.h" +#include "lpc17xx_pinsel.h" +#include "debug_frmwrk.h" +#include "lpc17xx_gpio.h" + +/* Example group ----------------------------------------------------------- */ +/** @defgroup SPI_Master Master + * @ingroup SPI_Examples + * @{ + */ + +/************************** PRIVATE DEFINITIONS *********************/ +// PORT number that /CS pin assigned on +#define CS_PORT_NUM 0 +// PIN number that /CS pin assigned on +#define CS_PIN_NUM 16 +#define SPI_DATABIT_SIZE 10 + +/** Max buffer length */ +#define BUFFER_SIZE 0x40 + +/************************** PRIVATE VARIABLES *************************/ +uint8_t menu1[] = +"********************************************************************************\n\r" +"Hello NXP Semiconductors \n\r" +"SPI demo \n\r" +"\t - MCU: LPC17xx \n\r" +"\t - Core: ARM Cortex-M3 \n\r" +"\t - Communicate via: UART0 - 115200bps \n\r" +"\t An example of SPI using interrupt mode to test the SPI driver \n\r" +" This example uses SPI in master mode to communicate with SPI slave device \n\r" +" The master and slave transfer together a number of data byte \n\r" +"********************************************************************************\n\r"; +uint8_t menu2[] = "Demo terminated! \n\r"; + +// SPI Configuration structure variable +SPI_CFG_Type SPI_ConfigStruct; + +#if (SPI_DATABIT_SIZE == 8) +uint8_t Tx_Buf[BUFFER_SIZE]; +uint8_t Rx_Buf[BUFFER_SIZE]; +#else +uint16_t Tx_Buf[BUFFER_SIZE]; +uint16_t Rx_Buf[BUFFER_SIZE]; +#endif + +/************************** PRIVATE FUNCTIONS *************************/ +void CS_Init(void); +void CS_Force(int32_t state); +void print_menu(void); +void Buffer_Init(void); +void Error_Loop(void); +void Buffer_Verify(void); + +/*-------------------------PRIVATE FUNCTIONS------------------------------*/ +/*********************************************************************//** + * @brief Initialize CS pin as GPIO function to drive /CS pin + * due to definition of CS_PORT_NUM and CS_PORT_NUM + * @param None + * @return None + ***********************************************************************/ +void CS_Init(void) +{ + GPIO_SetDir(CS_PORT_NUM, (1<<CS_PIN_NUM), 1); + GPIO_SetValue(CS_PORT_NUM, (1<<CS_PIN_NUM)); +} + + +/*********************************************************************//** + * @brief Drive CS output pin to low/high level to select slave device + * via /CS pin state + * @param[in] state State of CS output pin that will be driven: + * - 0: Drive CS pin to low level + * - 1: Drive CS pin to high level + * @return None + ***********************************************************************/ +void CS_Force(int32_t state) +{ + if (state){ + GPIO_SetValue(CS_PORT_NUM, (1<<CS_PIN_NUM)); + }else{ + GPIO_ClearValue(CS_PORT_NUM, (1<<CS_PIN_NUM)); + } +} + +/*********************************************************************//** + * @brief Initialize buffer + * @param[in] None + * @return None + **********************************************************************/ +void Buffer_Init(void) +{ + uint8_t i; +#if (SPI_DATABIT_SIZE == 8) + for (i = 0; i < BUFFER_SIZE; i++) { + Tx_Buf[i] = i; + Rx_Buf[i] = 0; + } +#else + for (i = 0; i < BUFFER_SIZE/2; i++) { + Tx_Buf[i] = i; + Rx_Buf[i] = 0; + } +#endif +} + +/*********************************************************************//** + * @brief Error Loop (called by Buffer_Verify() if any error) + * @param[in] none + * @return None + **********************************************************************/ +void Error_Loop(void) +{ + /* Loop forever */ + while (1); +} + +/*********************************************************************//** + * @brief Verify buffer + * @param[in] none + * @return None + **********************************************************************/ +void Buffer_Verify(void) +{ + uint8_t i; +#if (DATA_SIZE==8) + uint8_t *src_addr = (uint8_t *) &Tx_Buf[0]; + uint8_t *dest_addr = (uint8_t *) &Rx_Buf[0]; + for ( i = 0; i < SPI_DATABIT_SIZE; i++ ) + { + if ( *src_addr++ != *dest_addr++ ) + { + /* Call Error Loop */ + _DBG_("Verify error"); + Error_Loop(); + } + } +#else + uint16_t *src_addr = (uint16_t *) &Tx_Buf[0]; + uint16_t *dest_addr = (uint16_t *) &Rx_Buf[0]; + for ( i = 0; i < SPI_DATABIT_SIZE/2; i++ ) + { + if ( *src_addr++ != *dest_addr++ ) + { + /* Call Error Loop */ + _DBG_("Verify error"); + Error_Loop(); + } + } +#endif +} + +/*********************************************************************//** + * @brief Print Welcome menu + * @param[in] none + * @return None + **********************************************************************/ +void print_menu(void) +{ + _DBG(menu1); +} + +/*-------------------------MAIN FUNCTION------------------------------*/ +/*********************************************************************//** + * @brief c_entry: Main SPI program body + * @param[in] None + * @return int + **********************************************************************/ +int c_entry(void) +{ + PINSEL_CFG_Type PinCfg; + SPI_DATA_SETUP_Type xferConfig; + uint32_t tmp; + + /* + * Initialize SPI pin connect + * P0.15 - SCK; + * P0.16 - SSEL - used as GPIO + * P0.17 - MISO + * P0.18 - MOSI + */ + PinCfg.Funcnum = 3; + PinCfg.OpenDrain = 0; + PinCfg.Pinmode = 0; + PinCfg.Portnum = 0; + PinCfg.Pinnum = 15; + PINSEL_ConfigPin(&PinCfg); + PinCfg.Pinnum = 17; + PINSEL_ConfigPin(&PinCfg); + PinCfg.Pinnum = 18; + PINSEL_ConfigPin(&PinCfg); + PinCfg.Pinnum = 16; + PinCfg.Funcnum = 0; + PINSEL_ConfigPin(&PinCfg); + + /* Initialize debug via UART0 + * 115200bps + * 8 data bit + * No parity + * 1 stop bit + * No flow control + */ + debug_frmwrk_init(); + + // print welcome screen + print_menu(); + + SPI_ConfigStruct.CPHA = SPI_CPHA_SECOND; + SPI_ConfigStruct.CPOL = SPI_CPOL_LO; + SPI_ConfigStruct.ClockRate = 2000000; + SPI_ConfigStruct.DataOrder = SPI_DATA_MSB_FIRST; + SPI_ConfigStruct.Databit = SPI_DATABIT_SIZE; + SPI_ConfigStruct.Mode = SPI_MASTER_MODE; + // Initialize SPI peripheral with parameter given in structure above + SPI_Init(LPC_SPI, &SPI_ConfigStruct); + + _DBG_("Press '1' to start transfer..."); + + while (_DG != '1'); + + _DBG_("Init buffer"); + /* Initialize Buffer */ + Buffer_Init(); + + CS_Init(); + + _DBG_("Start transfer..."); + CS_Force(0); + // delay for a while + for (tmp = 10000; tmp; tmp--); + xferConfig.tx_data = Tx_Buf; + xferConfig.rx_data = Rx_Buf; + xferConfig.length = BUFFER_SIZE; + SPI_ReadWrite(LPC_SPI, &xferConfig, SPI_TRANSFER_POLLING); + // delay for a while + for (tmp = 10000; tmp; tmp--); + CS_Force(1); + _DBG_("Complete!"); + + // Verify buffer after transferring + Buffer_Verify(); + _DBG_("Verify complete!"); + SPI_DeInit(LPC_SPI); + /* Loop forever */ + while(1); + return 1; +} + +/* With ARM and GHS toolsets, the entry point is main() - this will + allow the linker to generate wrapper code to setup stacks, allocate + heap area, and initialize and copy code and data segments. For GNU + toolsets, the entry point is through __start() in the crt0_gnu.asm + file, and that startup code will setup stacks and data */ +int main(void) +{ + return c_entry(); +} + + +#ifdef DEBUG +/******************************************************************************* +* @brief Reports the name of the source file and the source line number +* where the CHECK_PARAM error has occurred. +* @param[in] file Pointer to the source file name +* @param[in] line assert_param error line source number +* @return None +*******************************************************************************/ +void check_failed(uint8_t *file, uint32_t line) +{ + /* User can add his own implementation to report the file name and line number, + ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ + + /* Infinite loop */ + while(1); +} +#endif + +/* + * @} + */