Frank 26080115
These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
UART/Interrupt/uart_interrupt_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_interrupt_test.c |
| frank26080115 | 0:bf7b9fba3924 | 3 | * @purpose This example describes how to using UART in interrupt 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_pinsel.h" |
| frank26080115 | 0:bf7b9fba3924 | 22 | |
| frank26080115 | 0:bf7b9fba3924 | 23 | /* Example group ----------------------------------------------------------- */ |
| frank26080115 | 0:bf7b9fba3924 | 24 | /** @defgroup UART_Interrupt Interrupt |
| frank26080115 | 0:bf7b9fba3924 | 25 | * @ingroup UART_Examples |
| frank26080115 | 0:bf7b9fba3924 | 26 | * @{ |
| frank26080115 | 0:bf7b9fba3924 | 27 | */ |
| frank26080115 | 0:bf7b9fba3924 | 28 | |
| frank26080115 | 0:bf7b9fba3924 | 29 | /************************** PRIVATE DEFINTIONS *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 30 | /* buffer size definition */ |
| frank26080115 | 0:bf7b9fba3924 | 31 | #define UART_RING_BUFSIZE 256 |
| frank26080115 | 0:bf7b9fba3924 | 32 | |
| frank26080115 | 0:bf7b9fba3924 | 33 | /* Buf mask */ |
| frank26080115 | 0:bf7b9fba3924 | 34 | #define __BUF_MASK (UART_RING_BUFSIZE-1) |
| frank26080115 | 0:bf7b9fba3924 | 35 | /* Check buf is full or not */ |
| frank26080115 | 0:bf7b9fba3924 | 36 | #define __BUF_IS_FULL(head, tail) ((tail&__BUF_MASK)==((head+1)&__BUF_MASK)) |
| frank26080115 | 0:bf7b9fba3924 | 37 | /* Check buf will be full in next receiving or not */ |
| frank26080115 | 0:bf7b9fba3924 | 38 | #define __BUF_WILL_FULL(head, tail) ((tail&__BUF_MASK)==((head+2)&__BUF_MASK)) |
| frank26080115 | 0:bf7b9fba3924 | 39 | /* Check buf is empty */ |
| frank26080115 | 0:bf7b9fba3924 | 40 | #define __BUF_IS_EMPTY(head, tail) ((head&__BUF_MASK)==(tail&__BUF_MASK)) |
| frank26080115 | 0:bf7b9fba3924 | 41 | /* Reset buf */ |
| frank26080115 | 0:bf7b9fba3924 | 42 | #define __BUF_RESET(bufidx) (bufidx=0) |
| frank26080115 | 0:bf7b9fba3924 | 43 | #define __BUF_INCR(bufidx) (bufidx=(bufidx+1)&__BUF_MASK) |
| frank26080115 | 0:bf7b9fba3924 | 44 | |
| frank26080115 | 0:bf7b9fba3924 | 45 | |
| frank26080115 | 0:bf7b9fba3924 | 46 | /************************** PRIVATE TYPES *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 47 | |
| frank26080115 | 0:bf7b9fba3924 | 48 | /** @brief UART Ring buffer structure */ |
| frank26080115 | 0:bf7b9fba3924 | 49 | typedef struct |
| frank26080115 | 0:bf7b9fba3924 | 50 | { |
| frank26080115 | 0:bf7b9fba3924 | 51 | __IO uint32_t tx_head; /*!< UART Tx ring buffer head index */ |
| frank26080115 | 0:bf7b9fba3924 | 52 | __IO uint32_t tx_tail; /*!< UART Tx ring buffer tail index */ |
| frank26080115 | 0:bf7b9fba3924 | 53 | __IO uint32_t rx_head; /*!< UART Rx ring buffer head index */ |
| frank26080115 | 0:bf7b9fba3924 | 54 | __IO uint32_t rx_tail; /*!< UART Rx ring buffer tail index */ |
| frank26080115 | 0:bf7b9fba3924 | 55 | __IO uint8_t tx[UART_RING_BUFSIZE]; /*!< UART Tx data ring buffer */ |
| frank26080115 | 0:bf7b9fba3924 | 56 | __IO uint8_t rx[UART_RING_BUFSIZE]; /*!< UART Rx data ring buffer */ |
| frank26080115 | 0:bf7b9fba3924 | 57 | } UART_RING_BUFFER_T; |
| frank26080115 | 0:bf7b9fba3924 | 58 | |
| frank26080115 | 0:bf7b9fba3924 | 59 | |
| frank26080115 | 0:bf7b9fba3924 | 60 | /************************** PRIVATE VARIABLES *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 61 | uint8_t menu1[] = "Hello NXP Semiconductors \n\r"; |
| frank26080115 | 0:bf7b9fba3924 | 62 | uint8_t menu2[] = |
| frank26080115 | 0:bf7b9fba3924 | 63 | "UART interrupt mode demo using ring buffer \n\r\t " |
| frank26080115 | 0:bf7b9fba3924 | 64 | "MCU LPC17xx - ARM Cortex-M3 \n\r\t " |
| frank26080115 | 0:bf7b9fba3924 | 65 | "UART0 - 9600bps \n\r"; |
| frank26080115 | 0:bf7b9fba3924 | 66 | uint8_t menu3[] = "UART demo terminated!\n"; |
| frank26080115 | 0:bf7b9fba3924 | 67 | |
| frank26080115 | 0:bf7b9fba3924 | 68 | // UART Ring buffer |
| frank26080115 | 0:bf7b9fba3924 | 69 | UART_RING_BUFFER_T rb; |
| frank26080115 | 0:bf7b9fba3924 | 70 | |
| frank26080115 | 0:bf7b9fba3924 | 71 | // Current Tx Interrupt enable state |
| frank26080115 | 0:bf7b9fba3924 | 72 | __IO FlagStatus TxIntStat; |
| frank26080115 | 0:bf7b9fba3924 | 73 | |
| frank26080115 | 0:bf7b9fba3924 | 74 | |
| frank26080115 | 0:bf7b9fba3924 | 75 | /************************** PRIVATE FUNCTIONS *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 76 | /* Interrupt service routines */ |
| frank26080115 | 0:bf7b9fba3924 | 77 | void UART0_IRQHandler(void); |
| frank26080115 | 0:bf7b9fba3924 | 78 | void UART_IntErr(uint8_t bLSErrType); |
| frank26080115 | 0:bf7b9fba3924 | 79 | void UART_IntTransmit(void); |
| frank26080115 | 0:bf7b9fba3924 | 80 | void UART_IntReceive(void); |
| frank26080115 | 0:bf7b9fba3924 | 81 | |
| frank26080115 | 0:bf7b9fba3924 | 82 | uint32_t UARTReceive(LPC_UART_TypeDef *UARTPort, uint8_t *rxbuf, uint8_t buflen); |
| frank26080115 | 0:bf7b9fba3924 | 83 | uint32_t UARTSend(LPC_UART_TypeDef *UARTPort, uint8_t *txbuf, uint8_t buflen); |
| frank26080115 | 0:bf7b9fba3924 | 84 | void print_menu(void); |
| frank26080115 | 0:bf7b9fba3924 | 85 | |
| frank26080115 | 0:bf7b9fba3924 | 86 | /*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 87 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 88 | * @brief UART0 interrupt handler sub-routine |
| frank26080115 | 0:bf7b9fba3924 | 89 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 90 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 91 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 92 | void UART0_IRQHandler(void) |
| frank26080115 | 0:bf7b9fba3924 | 93 | { |
| frank26080115 | 0:bf7b9fba3924 | 94 | uint32_t intsrc, tmp, tmp1; |
| frank26080115 | 0:bf7b9fba3924 | 95 | |
| frank26080115 | 0:bf7b9fba3924 | 96 | /* Determine the interrupt source */ |
| frank26080115 | 0:bf7b9fba3924 | 97 | intsrc = UART_GetIntId(LPC_UART0); |
| frank26080115 | 0:bf7b9fba3924 | 98 | tmp = intsrc & UART_IIR_INTID_MASK; |
| frank26080115 | 0:bf7b9fba3924 | 99 | |
| frank26080115 | 0:bf7b9fba3924 | 100 | // Receive Line Status |
| frank26080115 | 0:bf7b9fba3924 | 101 | if (tmp == UART_IIR_INTID_RLS){ |
| frank26080115 | 0:bf7b9fba3924 | 102 | // Check line status |
| frank26080115 | 0:bf7b9fba3924 | 103 | tmp1 = UART_GetLineStatus(LPC_UART0); |
| frank26080115 | 0:bf7b9fba3924 | 104 | // Mask out the Receive Ready and Transmit Holding empty status |
| frank26080115 | 0:bf7b9fba3924 | 105 | tmp1 &= (UART_LSR_OE | UART_LSR_PE | UART_LSR_FE \ |
| frank26080115 | 0:bf7b9fba3924 | 106 | | UART_LSR_BI | UART_LSR_RXFE); |
| frank26080115 | 0:bf7b9fba3924 | 107 | // If any error exist |
| frank26080115 | 0:bf7b9fba3924 | 108 | if (tmp1) { |
| frank26080115 | 0:bf7b9fba3924 | 109 | UART_IntErr(tmp1); |
| frank26080115 | 0:bf7b9fba3924 | 110 | } |
| frank26080115 | 0:bf7b9fba3924 | 111 | } |
| frank26080115 | 0:bf7b9fba3924 | 112 | |
| frank26080115 | 0:bf7b9fba3924 | 113 | // Receive Data Available or Character time-out |
| frank26080115 | 0:bf7b9fba3924 | 114 | if ((tmp == UART_IIR_INTID_RDA) || (tmp == UART_IIR_INTID_CTI)){ |
| frank26080115 | 0:bf7b9fba3924 | 115 | UART_IntReceive(); |
| frank26080115 | 0:bf7b9fba3924 | 116 | } |
| frank26080115 | 0:bf7b9fba3924 | 117 | |
| frank26080115 | 0:bf7b9fba3924 | 118 | // Transmit Holding Empty |
| frank26080115 | 0:bf7b9fba3924 | 119 | if (tmp == UART_IIR_INTID_THRE){ |
| frank26080115 | 0:bf7b9fba3924 | 120 | UART_IntTransmit(); |
| frank26080115 | 0:bf7b9fba3924 | 121 | } |
| frank26080115 | 0:bf7b9fba3924 | 122 | |
| frank26080115 | 0:bf7b9fba3924 | 123 | } |
| frank26080115 | 0:bf7b9fba3924 | 124 | |
| frank26080115 | 0:bf7b9fba3924 | 125 | /********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 126 | * @brief UART receive function (ring buffer used) |
| frank26080115 | 0:bf7b9fba3924 | 127 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 128 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 129 | *********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 130 | void UART_IntReceive(void) |
| frank26080115 | 0:bf7b9fba3924 | 131 | { |
| frank26080115 | 0:bf7b9fba3924 | 132 | uint8_t tmpc; |
| frank26080115 | 0:bf7b9fba3924 | 133 | uint32_t rLen; |
| frank26080115 | 0:bf7b9fba3924 | 134 | |
| frank26080115 | 0:bf7b9fba3924 | 135 | while(1){ |
| frank26080115 | 0:bf7b9fba3924 | 136 | // Call UART read function in UART driver |
| frank26080115 | 0:bf7b9fba3924 | 137 | rLen = UART_Receive((LPC_UART_TypeDef *)LPC_UART0, &tmpc, 1, NONE_BLOCKING); |
| frank26080115 | 0:bf7b9fba3924 | 138 | // If data received |
| frank26080115 | 0:bf7b9fba3924 | 139 | if (rLen){ |
| frank26080115 | 0:bf7b9fba3924 | 140 | /* Check if buffer is more space |
| frank26080115 | 0:bf7b9fba3924 | 141 | * If no more space, remaining character will be trimmed out |
| frank26080115 | 0:bf7b9fba3924 | 142 | */ |
| frank26080115 | 0:bf7b9fba3924 | 143 | if (!__BUF_IS_FULL(rb.rx_head,rb.rx_tail)){ |
| frank26080115 | 0:bf7b9fba3924 | 144 | rb.rx[rb.rx_head] = tmpc; |
| frank26080115 | 0:bf7b9fba3924 | 145 | __BUF_INCR(rb.rx_head); |
| frank26080115 | 0:bf7b9fba3924 | 146 | } |
| frank26080115 | 0:bf7b9fba3924 | 147 | } |
| frank26080115 | 0:bf7b9fba3924 | 148 | // no more data |
| frank26080115 | 0:bf7b9fba3924 | 149 | else { |
| frank26080115 | 0:bf7b9fba3924 | 150 | break; |
| frank26080115 | 0:bf7b9fba3924 | 151 | } |
| frank26080115 | 0:bf7b9fba3924 | 152 | } |
| frank26080115 | 0:bf7b9fba3924 | 153 | } |
| frank26080115 | 0:bf7b9fba3924 | 154 | |
| frank26080115 | 0:bf7b9fba3924 | 155 | /********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 156 | * @brief UART transmit function (ring buffer used) |
| frank26080115 | 0:bf7b9fba3924 | 157 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 158 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 159 | *********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 160 | void UART_IntTransmit(void) |
| frank26080115 | 0:bf7b9fba3924 | 161 | { |
| frank26080115 | 0:bf7b9fba3924 | 162 | // Disable THRE interrupt |
| frank26080115 | 0:bf7b9fba3924 | 163 | UART_IntConfig((LPC_UART_TypeDef *)LPC_UART0, UART_INTCFG_THRE, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 164 | |
| frank26080115 | 0:bf7b9fba3924 | 165 | /* Wait for FIFO buffer empty, transfer UART_TX_FIFO_SIZE bytes |
| frank26080115 | 0:bf7b9fba3924 | 166 | * of data or break whenever ring buffers are empty */ |
| frank26080115 | 0:bf7b9fba3924 | 167 | /* Wait until THR empty */ |
| frank26080115 | 0:bf7b9fba3924 | 168 | while (UART_CheckBusy((LPC_UART_TypeDef *)LPC_UART0) == SET); |
| frank26080115 | 0:bf7b9fba3924 | 169 | |
| frank26080115 | 0:bf7b9fba3924 | 170 | while (!__BUF_IS_EMPTY(rb.tx_head,rb.tx_tail)) |
| frank26080115 | 0:bf7b9fba3924 | 171 | { |
| frank26080115 | 0:bf7b9fba3924 | 172 | /* Move a piece of data into the transmit FIFO */ |
| frank26080115 | 0:bf7b9fba3924 | 173 | if (UART_Send((LPC_UART_TypeDef *)LPC_UART0, (uint8_t *)&rb.tx[rb.tx_tail], 1, NONE_BLOCKING)){ |
| frank26080115 | 0:bf7b9fba3924 | 174 | /* Update transmit ring FIFO tail pointer */ |
| frank26080115 | 0:bf7b9fba3924 | 175 | __BUF_INCR(rb.tx_tail); |
| frank26080115 | 0:bf7b9fba3924 | 176 | } else { |
| frank26080115 | 0:bf7b9fba3924 | 177 | break; |
| frank26080115 | 0:bf7b9fba3924 | 178 | } |
| frank26080115 | 0:bf7b9fba3924 | 179 | } |
| frank26080115 | 0:bf7b9fba3924 | 180 | |
| frank26080115 | 0:bf7b9fba3924 | 181 | /* If there is no more data to send, disable the transmit |
| frank26080115 | 0:bf7b9fba3924 | 182 | interrupt - else enable it or keep it enabled */ |
| frank26080115 | 0:bf7b9fba3924 | 183 | if (__BUF_IS_EMPTY(rb.tx_head, rb.tx_tail)) { |
| frank26080115 | 0:bf7b9fba3924 | 184 | UART_IntConfig((LPC_UART_TypeDef *)LPC_UART0, UART_INTCFG_THRE, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 185 | // Reset Tx Interrupt state |
| frank26080115 | 0:bf7b9fba3924 | 186 | TxIntStat = RESET; |
| frank26080115 | 0:bf7b9fba3924 | 187 | } |
| frank26080115 | 0:bf7b9fba3924 | 188 | else{ |
| frank26080115 | 0:bf7b9fba3924 | 189 | // Set Tx Interrupt state |
| frank26080115 | 0:bf7b9fba3924 | 190 | TxIntStat = SET; |
| frank26080115 | 0:bf7b9fba3924 | 191 | UART_IntConfig((LPC_UART_TypeDef *)LPC_UART0, UART_INTCFG_THRE, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 192 | } |
| frank26080115 | 0:bf7b9fba3924 | 193 | } |
| frank26080115 | 0:bf7b9fba3924 | 194 | |
| frank26080115 | 0:bf7b9fba3924 | 195 | |
| frank26080115 | 0:bf7b9fba3924 | 196 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 197 | * @brief UART Line Status Error |
| frank26080115 | 0:bf7b9fba3924 | 198 | * @param[in] bLSErrType UART Line Status Error Type |
| frank26080115 | 0:bf7b9fba3924 | 199 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 200 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 201 | void UART_IntErr(uint8_t bLSErrType) |
| frank26080115 | 0:bf7b9fba3924 | 202 | { |
| frank26080115 | 0:bf7b9fba3924 | 203 | uint8_t test; |
| frank26080115 | 0:bf7b9fba3924 | 204 | // Loop forever |
| frank26080115 | 0:bf7b9fba3924 | 205 | while (1){ |
| frank26080115 | 0:bf7b9fba3924 | 206 | // For testing purpose |
| frank26080115 | 0:bf7b9fba3924 | 207 | test = bLSErrType; |
| frank26080115 | 0:bf7b9fba3924 | 208 | } |
| frank26080115 | 0:bf7b9fba3924 | 209 | } |
| frank26080115 | 0:bf7b9fba3924 | 210 | |
| frank26080115 | 0:bf7b9fba3924 | 211 | /*-------------------------PRIVATE FUNCTIONS------------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 212 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 213 | * @brief UART transmit function for interrupt mode (using ring buffers) |
| frank26080115 | 0:bf7b9fba3924 | 214 | * @param[in] UARTPort Selected UART peripheral used to send data, |
| frank26080115 | 0:bf7b9fba3924 | 215 | * should be UART0 |
| frank26080115 | 0:bf7b9fba3924 | 216 | * @param[out] txbuf Pointer to Transmit buffer |
| frank26080115 | 0:bf7b9fba3924 | 217 | * @param[in] buflen Length of Transmit buffer |
| frank26080115 | 0:bf7b9fba3924 | 218 | * @return Number of bytes actually sent to the ring buffer |
| frank26080115 | 0:bf7b9fba3924 | 219 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 220 | uint32_t UARTSend(LPC_UART_TypeDef *UARTPort, uint8_t *txbuf, uint8_t buflen) |
| frank26080115 | 0:bf7b9fba3924 | 221 | { |
| frank26080115 | 0:bf7b9fba3924 | 222 | uint8_t *data = (uint8_t *) txbuf; |
| frank26080115 | 0:bf7b9fba3924 | 223 | uint32_t bytes = 0; |
| frank26080115 | 0:bf7b9fba3924 | 224 | |
| frank26080115 | 0:bf7b9fba3924 | 225 | /* Temporarily lock out UART transmit interrupts during this |
| frank26080115 | 0:bf7b9fba3924 | 226 | read so the UART transmit interrupt won't cause problems |
| frank26080115 | 0:bf7b9fba3924 | 227 | with the index values */ |
| frank26080115 | 0:bf7b9fba3924 | 228 | UART_IntConfig(UARTPort, UART_INTCFG_THRE, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 229 | |
| frank26080115 | 0:bf7b9fba3924 | 230 | /* Loop until transmit run buffer is full or until n_bytes |
| frank26080115 | 0:bf7b9fba3924 | 231 | expires */ |
| frank26080115 | 0:bf7b9fba3924 | 232 | while ((buflen > 0) && (!__BUF_IS_FULL(rb.tx_head, rb.tx_tail))) |
| frank26080115 | 0:bf7b9fba3924 | 233 | { |
| frank26080115 | 0:bf7b9fba3924 | 234 | /* Write data from buffer into ring buffer */ |
| frank26080115 | 0:bf7b9fba3924 | 235 | rb.tx[rb.tx_head] = *data; |
| frank26080115 | 0:bf7b9fba3924 | 236 | data++; |
| frank26080115 | 0:bf7b9fba3924 | 237 | |
| frank26080115 | 0:bf7b9fba3924 | 238 | /* Increment head pointer */ |
| frank26080115 | 0:bf7b9fba3924 | 239 | __BUF_INCR(rb.tx_head); |
| frank26080115 | 0:bf7b9fba3924 | 240 | |
| frank26080115 | 0:bf7b9fba3924 | 241 | /* Increment data count and decrement buffer size count */ |
| frank26080115 | 0:bf7b9fba3924 | 242 | bytes++; |
| frank26080115 | 0:bf7b9fba3924 | 243 | buflen--; |
| frank26080115 | 0:bf7b9fba3924 | 244 | } |
| frank26080115 | 0:bf7b9fba3924 | 245 | |
| frank26080115 | 0:bf7b9fba3924 | 246 | /* |
| frank26080115 | 0:bf7b9fba3924 | 247 | * Check if current Tx interrupt enable is reset, |
| frank26080115 | 0:bf7b9fba3924 | 248 | * that means the Tx interrupt must be re-enabled |
| frank26080115 | 0:bf7b9fba3924 | 249 | * due to call UART_IntTransmit() function to trigger |
| frank26080115 | 0:bf7b9fba3924 | 250 | * this interrupt type |
| frank26080115 | 0:bf7b9fba3924 | 251 | */ |
| frank26080115 | 0:bf7b9fba3924 | 252 | if (TxIntStat == RESET) { |
| frank26080115 | 0:bf7b9fba3924 | 253 | UART_IntTransmit(); |
| frank26080115 | 0:bf7b9fba3924 | 254 | } |
| frank26080115 | 0:bf7b9fba3924 | 255 | /* |
| frank26080115 | 0:bf7b9fba3924 | 256 | * Otherwise, re-enables Tx Interrupt |
| frank26080115 | 0:bf7b9fba3924 | 257 | */ |
| frank26080115 | 0:bf7b9fba3924 | 258 | else { |
| frank26080115 | 0:bf7b9fba3924 | 259 | UART_IntConfig(UARTPort, UART_INTCFG_THRE, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 260 | } |
| frank26080115 | 0:bf7b9fba3924 | 261 | |
| frank26080115 | 0:bf7b9fba3924 | 262 | return bytes; |
| frank26080115 | 0:bf7b9fba3924 | 263 | } |
| frank26080115 | 0:bf7b9fba3924 | 264 | |
| frank26080115 | 0:bf7b9fba3924 | 265 | |
| frank26080115 | 0:bf7b9fba3924 | 266 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 267 | * @brief UART read function for interrupt mode (using ring buffers) |
| frank26080115 | 0:bf7b9fba3924 | 268 | * @param[in] UARTPort Selected UART peripheral used to send data, |
| frank26080115 | 0:bf7b9fba3924 | 269 | * should be UART0 |
| frank26080115 | 0:bf7b9fba3924 | 270 | * @param[out] rxbuf Pointer to Received buffer |
| frank26080115 | 0:bf7b9fba3924 | 271 | * @param[in] buflen Length of Received buffer |
| frank26080115 | 0:bf7b9fba3924 | 272 | * @return Number of bytes actually read from the ring buffer |
| frank26080115 | 0:bf7b9fba3924 | 273 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 274 | uint32_t UARTReceive(LPC_UART_TypeDef *UARTPort, uint8_t *rxbuf, uint8_t buflen) |
| frank26080115 | 0:bf7b9fba3924 | 275 | { |
| frank26080115 | 0:bf7b9fba3924 | 276 | uint8_t *data = (uint8_t *) rxbuf; |
| frank26080115 | 0:bf7b9fba3924 | 277 | uint32_t bytes = 0; |
| frank26080115 | 0:bf7b9fba3924 | 278 | |
| frank26080115 | 0:bf7b9fba3924 | 279 | /* Temporarily lock out UART receive interrupts during this |
| frank26080115 | 0:bf7b9fba3924 | 280 | read so the UART receive interrupt won't cause problems |
| frank26080115 | 0:bf7b9fba3924 | 281 | with the index values */ |
| frank26080115 | 0:bf7b9fba3924 | 282 | UART_IntConfig(UARTPort, UART_INTCFG_RBR, DISABLE); |
| frank26080115 | 0:bf7b9fba3924 | 283 | |
| frank26080115 | 0:bf7b9fba3924 | 284 | /* Loop until receive buffer ring is empty or |
| frank26080115 | 0:bf7b9fba3924 | 285 | until max_bytes expires */ |
| frank26080115 | 0:bf7b9fba3924 | 286 | while ((buflen > 0) && (!(__BUF_IS_EMPTY(rb.rx_head, rb.rx_tail)))) |
| frank26080115 | 0:bf7b9fba3924 | 287 | { |
| frank26080115 | 0:bf7b9fba3924 | 288 | /* Read data from ring buffer into user buffer */ |
| frank26080115 | 0:bf7b9fba3924 | 289 | *data = rb.rx[rb.rx_tail]; |
| frank26080115 | 0:bf7b9fba3924 | 290 | data++; |
| frank26080115 | 0:bf7b9fba3924 | 291 | |
| frank26080115 | 0:bf7b9fba3924 | 292 | /* Update tail pointer */ |
| frank26080115 | 0:bf7b9fba3924 | 293 | __BUF_INCR(rb.rx_tail); |
| frank26080115 | 0:bf7b9fba3924 | 294 | |
| frank26080115 | 0:bf7b9fba3924 | 295 | /* Increment data count and decrement buffer size count */ |
| frank26080115 | 0:bf7b9fba3924 | 296 | bytes++; |
| frank26080115 | 0:bf7b9fba3924 | 297 | buflen--; |
| frank26080115 | 0:bf7b9fba3924 | 298 | } |
| frank26080115 | 0:bf7b9fba3924 | 299 | |
| frank26080115 | 0:bf7b9fba3924 | 300 | /* Re-enable UART interrupts */ |
| frank26080115 | 0:bf7b9fba3924 | 301 | UART_IntConfig(UARTPort, UART_INTCFG_RBR, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 302 | |
| frank26080115 | 0:bf7b9fba3924 | 303 | return bytes; |
| frank26080115 | 0:bf7b9fba3924 | 304 | } |
| frank26080115 | 0:bf7b9fba3924 | 305 | |
| frank26080115 | 0:bf7b9fba3924 | 306 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 307 | * @brief Print Welcome Screen Menu subroutine |
| frank26080115 | 0:bf7b9fba3924 | 308 | * @param None |
| frank26080115 | 0:bf7b9fba3924 | 309 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 310 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 311 | void print_menu(void) |
| frank26080115 | 0:bf7b9fba3924 | 312 | { |
| frank26080115 | 0:bf7b9fba3924 | 313 | uint32_t tmp, tmp2; |
| frank26080115 | 0:bf7b9fba3924 | 314 | uint8_t *pDat; |
| frank26080115 | 0:bf7b9fba3924 | 315 | |
| frank26080115 | 0:bf7b9fba3924 | 316 | tmp = sizeof(menu1); |
| frank26080115 | 0:bf7b9fba3924 | 317 | tmp2 = 0; |
| frank26080115 | 0:bf7b9fba3924 | 318 | pDat = (uint8_t *)&menu1[0]; |
| frank26080115 | 0:bf7b9fba3924 | 319 | while(tmp) { |
| frank26080115 | 0:bf7b9fba3924 | 320 | tmp2 = UARTSend((LPC_UART_TypeDef *)LPC_UART0, pDat, tmp); |
| frank26080115 | 0:bf7b9fba3924 | 321 | pDat += tmp2; |
| frank26080115 | 0:bf7b9fba3924 | 322 | tmp -= tmp2; |
| frank26080115 | 0:bf7b9fba3924 | 323 | } |
| frank26080115 | 0:bf7b9fba3924 | 324 | |
| frank26080115 | 0:bf7b9fba3924 | 325 | tmp = sizeof(menu2); |
| frank26080115 | 0:bf7b9fba3924 | 326 | tmp2 = 0; |
| frank26080115 | 0:bf7b9fba3924 | 327 | pDat = (uint8_t *)&menu2[0]; |
| frank26080115 | 0:bf7b9fba3924 | 328 | while(tmp) { |
| frank26080115 | 0:bf7b9fba3924 | 329 | tmp2 = UARTSend((LPC_UART_TypeDef *)LPC_UART0, pDat, tmp); |
| frank26080115 | 0:bf7b9fba3924 | 330 | pDat += tmp2; |
| frank26080115 | 0:bf7b9fba3924 | 331 | tmp -= tmp2; |
| frank26080115 | 0:bf7b9fba3924 | 332 | } |
| frank26080115 | 0:bf7b9fba3924 | 333 | } |
| frank26080115 | 0:bf7b9fba3924 | 334 | |
| frank26080115 | 0:bf7b9fba3924 | 335 | /*-------------------------MAIN FUNCTION------------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 336 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 337 | * @brief c_entry: Main UART program body |
| frank26080115 | 0:bf7b9fba3924 | 338 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 339 | * @return int |
| frank26080115 | 0:bf7b9fba3924 | 340 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 341 | int c_entry(void) |
| frank26080115 | 0:bf7b9fba3924 | 342 | { |
| frank26080115 | 0:bf7b9fba3924 | 343 | // UART Configuration structure variable |
| frank26080115 | 0:bf7b9fba3924 | 344 | UART_CFG_Type UARTConfigStruct; |
| frank26080115 | 0:bf7b9fba3924 | 345 | // UART FIFO configuration Struct variable |
| frank26080115 | 0:bf7b9fba3924 | 346 | UART_FIFO_CFG_Type UARTFIFOConfigStruct; |
| frank26080115 | 0:bf7b9fba3924 | 347 | // Pin configuration for UART0 |
| frank26080115 | 0:bf7b9fba3924 | 348 | PINSEL_CFG_Type PinCfg; |
| frank26080115 | 0:bf7b9fba3924 | 349 | |
| frank26080115 | 0:bf7b9fba3924 | 350 | uint32_t idx, len; |
| frank26080115 | 0:bf7b9fba3924 | 351 | __IO FlagStatus exitflag; |
| frank26080115 | 0:bf7b9fba3924 | 352 | uint8_t buffer[10]; |
| frank26080115 | 0:bf7b9fba3924 | 353 | |
| frank26080115 | 0:bf7b9fba3924 | 354 | /* |
| frank26080115 | 0:bf7b9fba3924 | 355 | * Initialize UART0 pin connect |
| frank26080115 | 0:bf7b9fba3924 | 356 | */ |
| frank26080115 | 0:bf7b9fba3924 | 357 | PinCfg.Funcnum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 358 | PinCfg.OpenDrain = 0; |
| frank26080115 | 0:bf7b9fba3924 | 359 | PinCfg.Pinmode = 0; |
| frank26080115 | 0:bf7b9fba3924 | 360 | PinCfg.Pinnum = 2; |
| frank26080115 | 0:bf7b9fba3924 | 361 | PinCfg.Portnum = 0; |
| frank26080115 | 0:bf7b9fba3924 | 362 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 363 | PinCfg.Pinnum = 3; |
| frank26080115 | 0:bf7b9fba3924 | 364 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 365 | |
| frank26080115 | 0:bf7b9fba3924 | 366 | |
| frank26080115 | 0:bf7b9fba3924 | 367 | /* Initialize UART Configuration parameter structure to default state: |
| frank26080115 | 0:bf7b9fba3924 | 368 | * Baudrate = 9600bps |
| frank26080115 | 0:bf7b9fba3924 | 369 | * 8 data bit |
| frank26080115 | 0:bf7b9fba3924 | 370 | * 1 Stop bit |
| frank26080115 | 0:bf7b9fba3924 | 371 | * None parity |
| frank26080115 | 0:bf7b9fba3924 | 372 | */ |
| frank26080115 | 0:bf7b9fba3924 | 373 | UART_ConfigStructInit(&UARTConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 374 | |
| frank26080115 | 0:bf7b9fba3924 | 375 | // Initialize UART0 peripheral with given to corresponding parameter |
| frank26080115 | 0:bf7b9fba3924 | 376 | UART_Init((LPC_UART_TypeDef *)LPC_UART0, &UARTConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 377 | |
| frank26080115 | 0:bf7b9fba3924 | 378 | |
| frank26080115 | 0:bf7b9fba3924 | 379 | /* Initialize FIFOConfigStruct to default state: |
| frank26080115 | 0:bf7b9fba3924 | 380 | * - FIFO_DMAMode = DISABLE |
| frank26080115 | 0:bf7b9fba3924 | 381 | * - FIFO_Level = UART_FIFO_TRGLEV0 |
| frank26080115 | 0:bf7b9fba3924 | 382 | * - FIFO_ResetRxBuf = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 383 | * - FIFO_ResetTxBuf = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 384 | * - FIFO_State = ENABLE |
| frank26080115 | 0:bf7b9fba3924 | 385 | */ |
| frank26080115 | 0:bf7b9fba3924 | 386 | UART_FIFOConfigStructInit(&UARTFIFOConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 387 | |
| frank26080115 | 0:bf7b9fba3924 | 388 | // Initialize FIFO for UART0 peripheral |
| frank26080115 | 0:bf7b9fba3924 | 389 | UART_FIFOConfig((LPC_UART_TypeDef *)LPC_UART0, &UARTFIFOConfigStruct); |
| frank26080115 | 0:bf7b9fba3924 | 390 | |
| frank26080115 | 0:bf7b9fba3924 | 391 | |
| frank26080115 | 0:bf7b9fba3924 | 392 | // Enable UART Transmit |
| frank26080115 | 0:bf7b9fba3924 | 393 | UART_TxCmd((LPC_UART_TypeDef *)LPC_UART0, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 394 | |
| frank26080115 | 0:bf7b9fba3924 | 395 | /* Enable UART Rx interrupt */ |
| frank26080115 | 0:bf7b9fba3924 | 396 | UART_IntConfig((LPC_UART_TypeDef *)LPC_UART0, UART_INTCFG_RBR, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 397 | /* Enable UART line status interrupt */ |
| frank26080115 | 0:bf7b9fba3924 | 398 | UART_IntConfig((LPC_UART_TypeDef *)LPC_UART0, UART_INTCFG_RLS, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 399 | /* |
| frank26080115 | 0:bf7b9fba3924 | 400 | * Do not enable transmit interrupt here, since it is handled by |
| frank26080115 | 0:bf7b9fba3924 | 401 | * UART_Send() function, just to reset Tx Interrupt state for the |
| frank26080115 | 0:bf7b9fba3924 | 402 | * first time |
| frank26080115 | 0:bf7b9fba3924 | 403 | */ |
| frank26080115 | 0:bf7b9fba3924 | 404 | TxIntStat = RESET; |
| frank26080115 | 0:bf7b9fba3924 | 405 | |
| frank26080115 | 0:bf7b9fba3924 | 406 | // Reset ring buf head and tail idx |
| frank26080115 | 0:bf7b9fba3924 | 407 | __BUF_RESET(rb.rx_head); |
| frank26080115 | 0:bf7b9fba3924 | 408 | __BUF_RESET(rb.rx_tail); |
| frank26080115 | 0:bf7b9fba3924 | 409 | __BUF_RESET(rb.tx_head); |
| frank26080115 | 0:bf7b9fba3924 | 410 | __BUF_RESET(rb.tx_tail); |
| frank26080115 | 0:bf7b9fba3924 | 411 | |
| frank26080115 | 0:bf7b9fba3924 | 412 | /* preemption = 1, sub-priority = 1 */ |
| frank26080115 | 0:bf7b9fba3924 | 413 | NVIC_SetPriority(UART0_IRQn, ((0x01<<3)|0x01)); |
| frank26080115 | 0:bf7b9fba3924 | 414 | /* Enable Interrupt for UART0 channel */ |
| frank26080115 | 0:bf7b9fba3924 | 415 | NVIC_EnableIRQ(UART0_IRQn); |
| frank26080115 | 0:bf7b9fba3924 | 416 | |
| frank26080115 | 0:bf7b9fba3924 | 417 | |
| frank26080115 | 0:bf7b9fba3924 | 418 | // print welcome screen |
| frank26080115 | 0:bf7b9fba3924 | 419 | print_menu(); |
| frank26080115 | 0:bf7b9fba3924 | 420 | |
| frank26080115 | 0:bf7b9fba3924 | 421 | // reset exit flag |
| frank26080115 | 0:bf7b9fba3924 | 422 | exitflag = RESET; |
| frank26080115 | 0:bf7b9fba3924 | 423 | |
| frank26080115 | 0:bf7b9fba3924 | 424 | /* Read some data from the buffer */ |
| frank26080115 | 0:bf7b9fba3924 | 425 | while (exitflag == RESET) |
| frank26080115 | 0:bf7b9fba3924 | 426 | { |
| frank26080115 | 0:bf7b9fba3924 | 427 | len = 0; |
| frank26080115 | 0:bf7b9fba3924 | 428 | while (len == 0) |
| frank26080115 | 0:bf7b9fba3924 | 429 | { |
| frank26080115 | 0:bf7b9fba3924 | 430 | len = UARTReceive((LPC_UART_TypeDef *)LPC_UART0, buffer, sizeof(buffer)); |
| frank26080115 | 0:bf7b9fba3924 | 431 | } |
| frank26080115 | 0:bf7b9fba3924 | 432 | |
| frank26080115 | 0:bf7b9fba3924 | 433 | /* Got some data */ |
| frank26080115 | 0:bf7b9fba3924 | 434 | idx = 0; |
| frank26080115 | 0:bf7b9fba3924 | 435 | while (idx < len) |
| frank26080115 | 0:bf7b9fba3924 | 436 | { |
| frank26080115 | 0:bf7b9fba3924 | 437 | if (buffer[idx] == 27) |
| frank26080115 | 0:bf7b9fba3924 | 438 | { |
| frank26080115 | 0:bf7b9fba3924 | 439 | /* ESC key, set exit flag */ |
| frank26080115 | 0:bf7b9fba3924 | 440 | UARTSend((LPC_UART_TypeDef *)LPC_UART0, menu3, sizeof(menu3)); |
| frank26080115 | 0:bf7b9fba3924 | 441 | exitflag = SET; |
| frank26080115 | 0:bf7b9fba3924 | 442 | } |
| frank26080115 | 0:bf7b9fba3924 | 443 | else if (buffer[idx] == 'r') |
| frank26080115 | 0:bf7b9fba3924 | 444 | { |
| frank26080115 | 0:bf7b9fba3924 | 445 | print_menu(); |
| frank26080115 | 0:bf7b9fba3924 | 446 | } |
| frank26080115 | 0:bf7b9fba3924 | 447 | else |
| frank26080115 | 0:bf7b9fba3924 | 448 | { |
| frank26080115 | 0:bf7b9fba3924 | 449 | /* Echo it back */ |
| frank26080115 | 0:bf7b9fba3924 | 450 | UARTSend((LPC_UART_TypeDef *)LPC_UART0, &buffer[idx], 1); |
| frank26080115 | 0:bf7b9fba3924 | 451 | } |
| frank26080115 | 0:bf7b9fba3924 | 452 | idx++; |
| frank26080115 | 0:bf7b9fba3924 | 453 | } |
| frank26080115 | 0:bf7b9fba3924 | 454 | } |
| frank26080115 | 0:bf7b9fba3924 | 455 | |
| frank26080115 | 0:bf7b9fba3924 | 456 | // wait for current transmission complete - THR must be empty |
| frank26080115 | 0:bf7b9fba3924 | 457 | while (UART_CheckBusy((LPC_UART_TypeDef *)LPC_UART0)); |
| frank26080115 | 0:bf7b9fba3924 | 458 | |
| frank26080115 | 0:bf7b9fba3924 | 459 | // DeInitialize UART0 peripheral |
| frank26080115 | 0:bf7b9fba3924 | 460 | UART_DeInit((LPC_UART_TypeDef *)LPC_UART0); |
| frank26080115 | 0:bf7b9fba3924 | 461 | |
| frank26080115 | 0:bf7b9fba3924 | 462 | /* Loop forever */ |
| frank26080115 | 0:bf7b9fba3924 | 463 | while(1); |
| frank26080115 | 0:bf7b9fba3924 | 464 | return 1; |
| frank26080115 | 0:bf7b9fba3924 | 465 | } |
| frank26080115 | 0:bf7b9fba3924 | 466 | |
| frank26080115 | 0:bf7b9fba3924 | 467 | /* With ARM and GHS toolsets, the entry point is main() - this will |
| frank26080115 | 0:bf7b9fba3924 | 468 | allow the linker to generate wrapper code to setup stacks, allocate |
| frank26080115 | 0:bf7b9fba3924 | 469 | heap area, and initialize and copy code and data segments. For GNU |
| frank26080115 | 0:bf7b9fba3924 | 470 | toolsets, the entry point is through __start() in the crt0_gnu.asm |
| frank26080115 | 0:bf7b9fba3924 | 471 | file, and that startup code will setup stacks and data */ |
| frank26080115 | 0:bf7b9fba3924 | 472 | int main(void) |
| frank26080115 | 0:bf7b9fba3924 | 473 | { |
| frank26080115 | 0:bf7b9fba3924 | 474 | return c_entry(); |
| frank26080115 | 0:bf7b9fba3924 | 475 | } |
| frank26080115 | 0:bf7b9fba3924 | 476 | |
| frank26080115 | 0:bf7b9fba3924 | 477 | #ifdef DEBUG |
| frank26080115 | 0:bf7b9fba3924 | 478 | /******************************************************************************* |
| frank26080115 | 0:bf7b9fba3924 | 479 | * @brief Reports the name of the source file and the source line number |
| frank26080115 | 0:bf7b9fba3924 | 480 | * where the CHECK_PARAM error has occurred. |
| frank26080115 | 0:bf7b9fba3924 | 481 | * @param[in] file Pointer to the source file name |
| frank26080115 | 0:bf7b9fba3924 | 482 | * @param[in] line assert_param error line source number |
| frank26080115 | 0:bf7b9fba3924 | 483 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 484 | *******************************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 485 | void check_failed(uint8_t *file, uint32_t line) |
| frank26080115 | 0:bf7b9fba3924 | 486 | { |
| frank26080115 | 0:bf7b9fba3924 | 487 | /* User can add his own implementation to report the file name and line number, |
| frank26080115 | 0:bf7b9fba3924 | 488 | ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
| frank26080115 | 0:bf7b9fba3924 | 489 | |
| frank26080115 | 0:bf7b9fba3924 | 490 | /* Infinite loop */ |
| frank26080115 | 0:bf7b9fba3924 | 491 | while(1); |
| frank26080115 | 0:bf7b9fba3924 | 492 | } |
| frank26080115 | 0:bf7b9fba3924 | 493 | #endif |
| frank26080115 | 0:bf7b9fba3924 | 494 | |
| frank26080115 | 0:bf7b9fba3924 | 495 | /* |
| frank26080115 | 0:bf7b9fba3924 | 496 | * @} |
| frank26080115 | 0:bf7b9fba3924 | 497 | */ |