Frank 26080115
These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
UART/DMA/uart_dma_test.c@0:bf7b9fba3924, 2011-03-20 (annotated)
- Committer:
- frank26080115
- Date:
- Sun Mar 20 05:38:56 2011 +0000
- Revision:
- 0:bf7b9fba3924
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| frank26080115 | 0:bf7b9fba3924 | 1 | /***********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 2 | * @file uart_dma_test.c |
| frank26080115 | 0:bf7b9fba3924 | 3 | * @purpose This example describes how to using UART in DMA mode |
| frank26080115 | 0:bf7b9fba3924 | 4 | * @version 2.0 |
| frank26080115 | 0:bf7b9fba3924 | 5 | * @date 21. May. 2010 |
| frank26080115 | 0:bf7b9fba3924 | 6 | * @author NXP MCU SW Application Team |
| frank26080115 | 0:bf7b9fba3924 | 7 | *--------------------------------------------------------------------- |
| frank26080115 | 0:bf7b9fba3924 | 8 | * Software that is described herein is for illustrative purposes only |
| frank26080115 | 0:bf7b9fba3924 | 9 | * which provides customers with programming information regarding the |
| frank26080115 | 0:bf7b9fba3924 | 10 | * products. This software is supplied "AS IS" without any warranties. |
| frank26080115 | 0:bf7b9fba3924 | 11 | * NXP Semiconductors assumes no responsibility or liability for the |
| frank26080115 | 0:bf7b9fba3924 | 12 | * use of the software, conveys no license or title under any patent, |
| frank26080115 | 0:bf7b9fba3924 | 13 | * copyright, or mask work right to the product. NXP Semiconductors |
| frank26080115 | 0:bf7b9fba3924 | 14 | * reserves the right to make changes in the software without |
| frank26080115 | 0:bf7b9fba3924 | 15 | * notification. NXP Semiconductors also make no representation or |
| frank26080115 | 0:bf7b9fba3924 | 16 | * warranty that such application will be suitable for the specified |
| frank26080115 | 0:bf7b9fba3924 | 17 | * use without further testing or modification. |
| frank26080115 | 0:bf7b9fba3924 | 18 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 19 | #include "lpc17xx_uart.h" |
| frank26080115 | 0:bf7b9fba3924 | 20 | #include "lpc17xx_libcfg.h" |
| frank26080115 | 0:bf7b9fba3924 | 21 | #include "lpc17xx_gpdma.h" |
| frank26080115 | 0:bf7b9fba3924 | 22 | #include "lpc17xx_pinsel.h" |
| frank26080115 | 0:bf7b9fba3924 | 23 | |
| frank26080115 | 0:bf7b9fba3924 | 24 | /* Example group ----------------------------------------------------------- */ |
| frank26080115 | 0:bf7b9fba3924 | 25 | /** @defgroup UART_DMA DMA |
| frank26080115 | 0:bf7b9fba3924 | 26 | * @ingroup UART_Examples |
| frank26080115 | 0:bf7b9fba3924 | 27 | * @{ |
| frank26080115 | 0:bf7b9fba3924 | 28 | */ |
| frank26080115 | 0:bf7b9fba3924 | 29 | |
| frank26080115 | 0:bf7b9fba3924 | 30 | /************************** PRIVATE DEFINITIONS *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 31 | /* Receive buffer size */ |
| frank26080115 | 0:bf7b9fba3924 | 32 | #define RX_BUF_SIZE 0x10 |
| frank26080115 | 0:bf7b9fba3924 | 33 | |
| frank26080115 | 0:bf7b9fba3924 | 34 | /************************** PRIVATE VARIABLES *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 35 | uint8_t menu1[] = |
| frank26080115 | 0:bf7b9fba3924 | 36 | "Hello NXP Semiconductors \n\r" |
| frank26080115 | 0:bf7b9fba3924 | 37 | "UART interrupt mode demo using ring buffer \n\r\t " |
| frank26080115 | 0:bf7b9fba3924 | 38 | "MCU LPC17xx - ARM Cortex-M3 \n\r\t " |
| frank26080115 | 0:bf7b9fba3924 | 39 | "UART0 - 9600bps \n\r" |
| frank26080115 | 0:bf7b9fba3924 | 40 | " This is a long string. It transferred in to DMA memory and transmit through Tx line \n\r" |
| frank26080115 | 0:bf7b9fba3924 | 41 | " on UART0 peripheral. To use UART with DMA mode, FIFO function must be enabled \n\r"; |
| frank26080115 | 0:bf7b9fba3924 | 42 | |
| frank26080115 | 0:bf7b9fba3924 | 43 | uint8_t menu3[] = "UART demo terminated!\n"; |
| frank26080115 | 0:bf7b9fba3924 | 44 | |
| frank26080115 | 0:bf7b9fba3924 | 45 | // Receive buffer |
| frank26080115 | 0:bf7b9fba3924 | 46 | __IO uint8_t rx_buf[RX_BUF_SIZE]; |
| frank26080115 | 0:bf7b9fba3924 | 47 | |
| frank26080115 | 0:bf7b9fba3924 | 48 | // Terminal Counter flag for Channel 0 |
| frank26080115 | 0:bf7b9fba3924 | 49 | __IO uint32_t Channel0_TC; |
| frank26080115 | 0:bf7b9fba3924 | 50 | |
| frank26080115 | 0:bf7b9fba3924 | 51 | // Error Counter flag for Channel 0 |
| frank26080115 | 0:bf7b9fba3924 | 52 | __IO uint32_t Channel0_Err; |
| frank26080115 | 0:bf7b9fba3924 | 53 | |
| frank26080115 | 0:bf7b9fba3924 | 54 | // Terminal Counter flag for Channel 1 |
| frank26080115 | 0:bf7b9fba3924 | 55 | __IO uint32_t Channel1_TC; |
| frank26080115 | 0:bf7b9fba3924 | 56 | |
| frank26080115 | 0:bf7b9fba3924 | 57 | // Error Counter flag for Channel 1 |
| frank26080115 | 0:bf7b9fba3924 | 58 | __IO uint32_t Channel1_Err; |
| frank26080115 | 0:bf7b9fba3924 | 59 | |
| frank26080115 | 0:bf7b9fba3924 | 60 | |
| frank26080115 | 0:bf7b9fba3924 | 61 | /************************** PRIVATE FUNCTIONS *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 62 | void DMA_IRQHandler (void); |
| frank26080115 | 0:bf7b9fba3924 | 63 | |
| frank26080115 | 0:bf7b9fba3924 | 64 | void print_menu(void); |
| frank26080115 | 0:bf7b9fba3924 | 65 | |
| frank26080115 | 0:bf7b9fba3924 | 66 | /*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 67 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 68 | * @brief GPDMA interrupt handler sub-routine |
| frank26080115 | 0:bf7b9fba3924 | 69 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 70 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 71 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 72 | void DMA_IRQHandler (void) |
| frank26080115 | 0:bf7b9fba3924 | 73 | { |
| frank26080115 | 0:bf7b9fba3924 | 74 | uint32_t tmp; |
| frank26080115 | 0:bf7b9fba3924 | 75 | // Scan interrupt pending |
| frank26080115 | 0:bf7b9fba3924 | 76 | for (tmp = 0; tmp <= 7; tmp++) { |
| frank26080115 | 0:bf7b9fba3924 | 77 | if (GPDMA_IntGetStatus(GPDMA_STAT_INT, tmp)){ |
| frank26080115 | 0:bf7b9fba3924 | 78 | // Check counter terminal status |
| frank26080115 | 0:bf7b9fba3924 | 79 | if(GPDMA_IntGetStatus(GPDMA_STAT_INTTC, tmp)){ |
| frank26080115 | 0:bf7b9fba3924 | 80 | // Clear terminate counter Interrupt pending |
| frank26080115 | 0:bf7b9fba3924 | 81 | GPDMA_ClearIntPending (GPDMA_STATCLR_INTTC, tmp); |
| frank26080115 | 0:bf7b9fba3924 | 82 | |
| frank26080115 | 0:bf7b9fba3924 | 83 | switch (tmp){ |
| frank26080115 | 0:bf7b9fba3924 | 84 | case 0: |
| frank26080115 | 0:bf7b9fba3924 | 85 | Channel0_TC++; |
| frank26080115 | 0:bf7b9fba3924 | 86 | GPDMA_ChannelCmd(0, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 87 | break; |
| frank26080115 | 0:bf7b9fba3924 | 88 | case 1: |
| frank26080115 | 0:bf7b9fba3924 | 89 | Channel1_TC++; |
| frank26080115 | 0:bf7b9fba3924 | 90 | GPDMA_ChannelCmd(1, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 91 | break; |
| frank26080115 | 0:bf7b9fba3924 | 92 | default: |
| frank26080115 | 0:bf7b9fba3924 | 93 | break; |
| frank26080115 | 0:bf7b9fba3924 | 94 | } |
| frank26080115 | 0:bf7b9fba3924 | 95 | |
| frank26080115 | 0:bf7b9fba3924 | 96 | } |
| frank26080115 | 0:bf7b9fba3924 | 97 | // Check error terminal status |
| frank26080115 | 0:bf7b9fba3924 | 98 | if (GPDMA_IntGetStatus(GPDMA_STAT_INTERR, tmp)){ |
| frank26080115 | 0:bf7b9fba3924 | 99 | // Clear error counter Interrupt pending |
| frank26080115 | 0:bf7b9fba3924 | 100 | GPDMA_ClearIntPending (GPDMA_STATCLR_INTERR, tmp); |
| frank26080115 | 0:bf7b9fba3924 | 101 | switch (tmp){ |
| frank26080115 | 0:bf7b9fba3924 | 102 | case 0: |
| frank26080115 | 0:bf7b9fba3924 | 103 | Channel0_Err++; |
| frank26080115 | 0:bf7b9fba3924 | 104 | GPDMA_ChannelCmd(0, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 105 | break; |
| frank26080115 | 0:bf7b9fba3924 | 106 | case 1: |
| frank26080115 | 0:bf7b9fba3924 | 107 | Channel1_Err++; |
| frank26080115 | 0:bf7b9fba3924 | 108 | GPDMA_ChannelCmd(1, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 109 | break; |
| frank26080115 | 0:bf7b9fba3924 | 110 | default: |
| frank26080115 | 0:bf7b9fba3924 | 111 | break; |
| frank26080115 | 0:bf7b9fba3924 | 112 | } |
| frank26080115 | 0:bf7b9fba3924 | 113 | } |
| frank26080115 | 0:bf7b9fba3924 | 114 | } |
| frank26080115 | 0:bf7b9fba3924 | 115 | } |
| frank26080115 | 0:bf7b9fba3924 | 116 | } |
| frank26080115 | 0:bf7b9fba3924 | 117 | |
| frank26080115 | 0:bf7b9fba3924 | 118 | /*-------------------------MAIN FUNCTION------------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 119 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 120 | * @brief c_entry: Main UART program body |
| frank26080115 | 0:bf7b9fba3924 | 121 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 122 | * @return int |
| frank26080115 | 0:bf7b9fba3924 | 123 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 124 | int c_entry(void) |
| frank26080115 | 0:bf7b9fba3924 | 125 | { |
| frank26080115 | 0:bf7b9fba3924 | 126 | uint8_t *rx_char; |
| frank26080115 | 0:bf7b9fba3924 | 127 | uint32_t idx; |
| frank26080115 | 0:bf7b9fba3924 | 128 | // UART Configuration structure variable |
| frank26080115 | 0:bf7b9fba3924 | 129 | UART_CFG_Type UARTConfigStruct; |
| frank26080115 | 0:bf7b9fba3924 | 130 | // UART FIFO configuration Struct variable |
| frank26080115 | 0:bf7b9fba3924 | 131 | UART_FIFO_CFG_Type UARTFIFOConfigStruct; |
| frank26080115 | 0:bf7b9fba3924 | 132 | GPDMA_Channel_CFG_Type GPDMACfg; |
| frank26080115 | 0:bf7b9fba3924 | 133 | // Pin configuration for UART0 |
| frank26080115 | 0:bf7b9fba3924 | 134 | PINSEL_CFG_Type PinCfg; |
| frank26080115 | 0:bf7b9fba3924 | 135 | |
| frank26080115 | 0:bf7b9fba3924 | 136 | /* |
| frank26080115 | 0:bf7b9fba3924 | 137 | * Initialize UART0 pin connect |
| frank26080115 | 0:bf7b9fba3924 | 138 | */ |
| frank26080115 | 0:bf7b9fba3924 | 139 | PinCfg.Funcnum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 140 | PinCfg.OpenDrain = 0; |
| frank26080115 | 0:bf7b9fba3924 | 141 | PinCfg.Pinmode = 0; |
| frank26080115 | 0:bf7b9fba3924 | 142 | PinCfg.Pinnum = 2; |
| frank26080115 | 0:bf7b9fba3924 | 143 | PinCfg.Portnum = 0; |
| frank26080115 | 0:bf7b9fba3924 | 144 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 145 | PinCfg.Pinnum = 3; |
| frank26080115 | 0:bf7b9fba3924 | 146 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 147 | |
| frank26080115 | 0:bf7b9fba3924 | 148 | /* Initialize UART Configuration parameter structure to default state: |
| frank26080115 | 0:bf7b9fba3924 | 149 | * Baudrate = 9600bps |
| frank26080115 | 0:bf7b9fba3924 | 150 | * 8 data bit |
| frank26080115 | 0:bf7b9fba3924 | 151 | * 1 Stop bit |
| frank26080115 | 0:bf7b9fba3924 | 152 | * None parity |
| frank26080115 | 0:bf7b9fba3924 | 153 | */ |
| frank26080115 | 0:bf7b9fba3924 | 154 | UART_ConfigStructInit(&UARTConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 155 | |
| frank26080115 | 0:bf7b9fba3924 | 156 | // Initialize UART0 peripheral with given to corresponding parameter |
| frank26080115 | 0:bf7b9fba3924 | 157 | UART_Init(LPC_UART0, &UARTConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 158 | |
| frank26080115 | 0:bf7b9fba3924 | 159 | |
| frank26080115 | 0:bf7b9fba3924 | 160 | /* Initialize FIFOConfigStruct to default state: |
| frank26080115 | 0:bf7b9fba3924 | 161 | * - FIFO_DMAMode = DISABLE |
| frank26080115 | 0:bf7b9fba3924 | 162 | * - FIFO_Level = UART_FIFO_TRGLEV0 |
| frank26080115 | 0:bf7b9fba3924 | 163 | * - FIFO_ResetRxBuf = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 164 | * - FIFO_ResetTxBuf = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 165 | * - FIFO_State = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 166 | */ |
| frank26080115 | 0:bf7b9fba3924 | 167 | UART_FIFOConfigStructInit(&UARTFIFOConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 168 | |
| frank26080115 | 0:bf7b9fba3924 | 169 | // Enable DMA mode in UART |
| frank26080115 | 0:bf7b9fba3924 | 170 | UARTFIFOConfigStruct.FIFO_DMAMode = ENABLE; |
| frank26080115 | 0:bf7b9fba3924 | 171 | |
| frank26080115 | 0:bf7b9fba3924 | 172 | // Initialize FIFO for UART0 peripheral |
| frank26080115 | 0:bf7b9fba3924 | 173 | UART_FIFOConfig(LPC_UART0, &UARTFIFOConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 174 | |
| frank26080115 | 0:bf7b9fba3924 | 175 | // Enable UART Transmit |
| frank26080115 | 0:bf7b9fba3924 | 176 | UART_TxCmd(LPC_UART0, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 177 | |
| frank26080115 | 0:bf7b9fba3924 | 178 | |
| frank26080115 | 0:bf7b9fba3924 | 179 | /* GPDMA Interrupt configuration section ------------------------------------------------- */ |
| frank26080115 | 0:bf7b9fba3924 | 180 | |
| frank26080115 | 0:bf7b9fba3924 | 181 | /* Initialize GPDMA controller */ |
| frank26080115 | 0:bf7b9fba3924 | 182 | GPDMA_Init(); |
| frank26080115 | 0:bf7b9fba3924 | 183 | |
| frank26080115 | 0:bf7b9fba3924 | 184 | |
| frank26080115 | 0:bf7b9fba3924 | 185 | /* Setting GPDMA interrupt */ |
| frank26080115 | 0:bf7b9fba3924 | 186 | // Disable interrupt for DMA |
| frank26080115 | 0:bf7b9fba3924 | 187 | NVIC_DisableIRQ (DMA_IRQn); |
| frank26080115 | 0:bf7b9fba3924 | 188 | /* preemption = 1, sub-priority = 1 */ |
| frank26080115 | 0:bf7b9fba3924 | 189 | NVIC_SetPriority(DMA_IRQn, ((0x01<<3)|0x01)); |
| frank26080115 | 0:bf7b9fba3924 | 190 | |
| frank26080115 | 0:bf7b9fba3924 | 191 | |
| frank26080115 | 0:bf7b9fba3924 | 192 | // Setup GPDMA channel -------------------------------- |
| frank26080115 | 0:bf7b9fba3924 | 193 | // channel 0 |
| frank26080115 | 0:bf7b9fba3924 | 194 | GPDMACfg.ChannelNum = 0; |
| frank26080115 | 0:bf7b9fba3924 | 195 | // Source memory |
| frank26080115 | 0:bf7b9fba3924 | 196 | GPDMACfg.SrcMemAddr = (uint32_t) &menu1; |
| frank26080115 | 0:bf7b9fba3924 | 197 | // Destination memory - don't care |
| frank26080115 | 0:bf7b9fba3924 | 198 | GPDMACfg.DstMemAddr = 0; |
| frank26080115 | 0:bf7b9fba3924 | 199 | // Transfer size |
| frank26080115 | 0:bf7b9fba3924 | 200 | GPDMACfg.TransferSize = sizeof(menu1); |
| frank26080115 | 0:bf7b9fba3924 | 201 | // Transfer width - don't care |
| frank26080115 | 0:bf7b9fba3924 | 202 | GPDMACfg.TransferWidth = 0; |
| frank26080115 | 0:bf7b9fba3924 | 203 | // Transfer type |
| frank26080115 | 0:bf7b9fba3924 | 204 | GPDMACfg.TransferType = GPDMA_TRANSFERTYPE_M2P; |
| frank26080115 | 0:bf7b9fba3924 | 205 | // Source connection - don't care |
| frank26080115 | 0:bf7b9fba3924 | 206 | GPDMACfg.SrcConn = 0; |
| frank26080115 | 0:bf7b9fba3924 | 207 | // Destination connection |
| frank26080115 | 0:bf7b9fba3924 | 208 | GPDMACfg.DstConn = GPDMA_CONN_UART0_Tx; |
| frank26080115 | 0:bf7b9fba3924 | 209 | // Linker List Item - unused |
| frank26080115 | 0:bf7b9fba3924 | 210 | GPDMACfg.DMALLI = 0; |
| frank26080115 | 0:bf7b9fba3924 | 211 | // Setup channel with given parameter |
| frank26080115 | 0:bf7b9fba3924 | 212 | GPDMA_Setup(&GPDMACfg); |
| frank26080115 | 0:bf7b9fba3924 | 213 | |
| frank26080115 | 0:bf7b9fba3924 | 214 | // Setup GPDMA channel -------------------------------- |
| frank26080115 | 0:bf7b9fba3924 | 215 | // channel 1 |
| frank26080115 | 0:bf7b9fba3924 | 216 | GPDMACfg.ChannelNum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 217 | // Source memory - don't care |
| frank26080115 | 0:bf7b9fba3924 | 218 | GPDMACfg.SrcMemAddr = 0; |
| frank26080115 | 0:bf7b9fba3924 | 219 | // Destination memory |
| frank26080115 | 0:bf7b9fba3924 | 220 | GPDMACfg.DstMemAddr = (uint32_t) &rx_buf; |
| frank26080115 | 0:bf7b9fba3924 | 221 | // Transfer size |
| frank26080115 | 0:bf7b9fba3924 | 222 | GPDMACfg.TransferSize = sizeof(rx_buf); |
| frank26080115 | 0:bf7b9fba3924 | 223 | // Transfer width - don't care |
| frank26080115 | 0:bf7b9fba3924 | 224 | GPDMACfg.TransferWidth = 0; |
| frank26080115 | 0:bf7b9fba3924 | 225 | // Transfer type |
| frank26080115 | 0:bf7b9fba3924 | 226 | GPDMACfg.TransferType = GPDMA_TRANSFERTYPE_P2M; |
| frank26080115 | 0:bf7b9fba3924 | 227 | // Source connection |
| frank26080115 | 0:bf7b9fba3924 | 228 | GPDMACfg.SrcConn = GPDMA_CONN_UART0_Rx; |
| frank26080115 | 0:bf7b9fba3924 | 229 | // Destination connection - don't care |
| frank26080115 | 0:bf7b9fba3924 | 230 | GPDMACfg.DstConn = 0; |
| frank26080115 | 0:bf7b9fba3924 | 231 | // Linker List Item - unused |
| frank26080115 | 0:bf7b9fba3924 | 232 | GPDMACfg.DMALLI = 0; |
| frank26080115 | 0:bf7b9fba3924 | 233 | GPDMA_Setup(&GPDMACfg); |
| frank26080115 | 0:bf7b9fba3924 | 234 | |
| frank26080115 | 0:bf7b9fba3924 | 235 | /* Reset terminal counter */ |
| frank26080115 | 0:bf7b9fba3924 | 236 | Channel0_TC = 0; |
| frank26080115 | 0:bf7b9fba3924 | 237 | /* Reset Error counter */ |
| frank26080115 | 0:bf7b9fba3924 | 238 | Channel0_Err = 0; |
| frank26080115 | 0:bf7b9fba3924 | 239 | |
| frank26080115 | 0:bf7b9fba3924 | 240 | // Enable interrupt for DMA |
| frank26080115 | 0:bf7b9fba3924 | 241 | NVIC_EnableIRQ (DMA_IRQn); |
| frank26080115 | 0:bf7b9fba3924 | 242 | |
| frank26080115 | 0:bf7b9fba3924 | 243 | // Enable GPDMA channel 0 |
| frank26080115 | 0:bf7b9fba3924 | 244 | GPDMA_ChannelCmd(0, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 245 | // Make sure GPDMA channel 1 is disabled |
| frank26080115 | 0:bf7b9fba3924 | 246 | GPDMA_ChannelCmd(1, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 247 | |
| frank26080115 | 0:bf7b9fba3924 | 248 | /* Wait for GPDMA on UART0 Tx processing complete */ |
| frank26080115 | 0:bf7b9fba3924 | 249 | while ((Channel0_TC == 0) && (Channel0_Err == 0)); |
| frank26080115 | 0:bf7b9fba3924 | 250 | |
| frank26080115 | 0:bf7b9fba3924 | 251 | // Main loop - echos back to the terminal |
| frank26080115 | 0:bf7b9fba3924 | 252 | while (1) |
| frank26080115 | 0:bf7b9fba3924 | 253 | { |
| frank26080115 | 0:bf7b9fba3924 | 254 | /* Reset terminal counter */ |
| frank26080115 | 0:bf7b9fba3924 | 255 | Channel1_TC = 0; |
| frank26080115 | 0:bf7b9fba3924 | 256 | /* Reset Error counter */ |
| frank26080115 | 0:bf7b9fba3924 | 257 | Channel1_Err = 0; |
| frank26080115 | 0:bf7b9fba3924 | 258 | |
| frank26080115 | 0:bf7b9fba3924 | 259 | // Setup channel with given parameter |
| frank26080115 | 0:bf7b9fba3924 | 260 | GPDMA_Setup(&GPDMACfg); |
| frank26080115 | 0:bf7b9fba3924 | 261 | |
| frank26080115 | 0:bf7b9fba3924 | 262 | // Enable GPDMA channel 1 |
| frank26080115 | 0:bf7b9fba3924 | 263 | GPDMA_ChannelCmd(1, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 264 | |
| frank26080115 | 0:bf7b9fba3924 | 265 | // Clear Rx buffer using DMA |
| frank26080115 | 0:bf7b9fba3924 | 266 | for (idx = 0; idx < RX_BUF_SIZE; idx++){ |
| frank26080115 | 0:bf7b9fba3924 | 267 | rx_buf[idx] = 0; |
| frank26080115 | 0:bf7b9fba3924 | 268 | } |
| frank26080115 | 0:bf7b9fba3924 | 269 | |
| frank26080115 | 0:bf7b9fba3924 | 270 | // now, start receive character using GPDMA |
| frank26080115 | 0:bf7b9fba3924 | 271 | rx_char = (uint8_t *) &rx_buf; |
| frank26080115 | 0:bf7b9fba3924 | 272 | while ((Channel1_TC == 0) && (Channel1_Err == 0)){ |
| frank26080115 | 0:bf7b9fba3924 | 273 | // Check whether if there's any character received, then print it back |
| frank26080115 | 0:bf7b9fba3924 | 274 | if (*rx_char != 0) |
| frank26080115 | 0:bf7b9fba3924 | 275 | { |
| frank26080115 | 0:bf7b9fba3924 | 276 | UART_Send(LPC_UART0, rx_char, 1, BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 277 | rx_char++; |
| frank26080115 | 0:bf7b9fba3924 | 278 | } |
| frank26080115 | 0:bf7b9fba3924 | 279 | } |
| frank26080115 | 0:bf7b9fba3924 | 280 | } |
| frank26080115 | 0:bf7b9fba3924 | 281 | |
| frank26080115 | 0:bf7b9fba3924 | 282 | // DeInitialize UART0 peripheral |
| frank26080115 | 0:bf7b9fba3924 | 283 | UART_DeInit(LPC_UART0); |
| frank26080115 | 0:bf7b9fba3924 | 284 | |
| frank26080115 | 0:bf7b9fba3924 | 285 | /* Loop forever */ |
| frank26080115 | 0:bf7b9fba3924 | 286 | while(1); |
| frank26080115 | 0:bf7b9fba3924 | 287 | return 1; |
| frank26080115 | 0:bf7b9fba3924 | 288 | } |
| frank26080115 | 0:bf7b9fba3924 | 289 | |
| frank26080115 | 0:bf7b9fba3924 | 290 | /* With ARM and GHS toolsets, the entry point is main() - this will |
| frank26080115 | 0:bf7b9fba3924 | 291 | allow the linker to generate wrapper code to setup stacks, allocate |
| frank26080115 | 0:bf7b9fba3924 | 292 | heap area, and initialize and copy code and data segments. For GNU |
| frank26080115 | 0:bf7b9fba3924 | 293 | toolsets, the entry point is through __start() in the crt0_gnu.asm |
| frank26080115 | 0:bf7b9fba3924 | 294 | file, and that startup code will setup stacks and data */ |
| frank26080115 | 0:bf7b9fba3924 | 295 | int main(void) |
| frank26080115 | 0:bf7b9fba3924 | 296 | { |
| frank26080115 | 0:bf7b9fba3924 | 297 | return c_entry(); |
| frank26080115 | 0:bf7b9fba3924 | 298 | } |
| frank26080115 | 0:bf7b9fba3924 | 299 | |
| frank26080115 | 0:bf7b9fba3924 | 300 | |
| frank26080115 | 0:bf7b9fba3924 | 301 | #ifdef DEBUG |
| frank26080115 | 0:bf7b9fba3924 | 302 | /******************************************************************************* |
| frank26080115 | 0:bf7b9fba3924 | 303 | * @brief Reports the name of the source file and the source line number |
| frank26080115 | 0:bf7b9fba3924 | 304 | * where the CHECK_PARAM error has occurred. |
| frank26080115 | 0:bf7b9fba3924 | 305 | * @param[in] file Pointer to the source file name |
| frank26080115 | 0:bf7b9fba3924 | 306 | * @param[in] line assert_param error line source number |
| frank26080115 | 0:bf7b9fba3924 | 307 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 308 | *******************************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 309 | void check_failed(uint8_t *file, uint32_t line) |
| frank26080115 | 0:bf7b9fba3924 | 310 | { |
| frank26080115 | 0:bf7b9fba3924 | 311 | /* User can add his own implementation to report the file name and line number, |
| frank26080115 | 0:bf7b9fba3924 | 312 | ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
| frank26080115 | 0:bf7b9fba3924 | 313 | |
| frank26080115 | 0:bf7b9fba3924 | 314 | /* Infinite loop */ |
| frank26080115 | 0:bf7b9fba3924 | 315 | while(1); |
| frank26080115 | 0:bf7b9fba3924 | 316 | } |
| frank26080115 | 0:bf7b9fba3924 | 317 | #endif |
| frank26080115 | 0:bf7b9fba3924 | 318 | |
| frank26080115 | 0:bf7b9fba3924 | 319 | /* |
| frank26080115 | 0:bf7b9fba3924 | 320 | * @} |
| frank26080115 | 0:bf7b9fba3924 | 321 | */ |