Robbie King / DMX

This is a fork for okini3939's great DMX library with added support for the EA LPC4088 QuickStart mbed-enabled board. I have added support and tested the 3 UARTs which are accessible on the DIP pins. This forked of okini3939's library was created in the hopes a pull request could be accepted and re-integrated into the library. Important Note: To use the special UART on "pins 41" (rx) and "pin 42" (tx) you must access them by their port names, which are P0_3 (rx) and P0_2 (tx), because the symbols p41 and p42 do not exist in the mbed world (yet).

Fork of DMX by Suga koubou

DMX.cpp@13:197c0fea0c62, 2013-12-02 (annotated)

Committer:
robodude
Date:
Mon Dec 02 06:49:25 2013 +0000
Revision:
13:197c0fea0c62
Parent:
12:1f176eee2d28 
Tested and added support for EA LPC4088 QuickStart mbed.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okini3939 0:cbff6bf41542 1 /*
okini3939 0:cbff6bf41542 2 * DMX512 send/recv library
okini3939 6:9e7b4eeac6ec 3 * Copyright (c) 2013 Hiroshi Suga
okini3939 0:cbff6bf41542 4 * Released under the MIT License: http://mbed.org/license/mit
okini3939 0:cbff6bf41542 5 */
okini3939 0:cbff6bf41542 6
okini3939 7:16d6874076dd 7 /** @file
okini3939 0:cbff6bf41542 8 * @brief DMX512 send/recv
okini3939 0:cbff6bf41542 9 */
okini3939 0:cbff6bf41542 10
okini3939 0:cbff6bf41542 11 #include "mbed.h"
okini3939 0:cbff6bf41542 12 #include "DMX.h"
okini3939 0:cbff6bf41542 13
okini3939 5:72039cd4c874 14 DMX::DMX (PinName p_tx, PinName p_rx) : _dmx(p_tx, p_rx) {
okini3939 0:cbff6bf41542 15
okini3939 12:1f176eee2d28 16 clear();
okini3939 4:dd0544c80096 17 // mode_tx = DMX_MODE_BEGIN;
okini3939 4:dd0544c80096 18 mode_tx = DMX_MODE_STOP;
okini3939 0:cbff6bf41542 19 mode_rx = DMX_MODE_BEGIN;
okini3939 0:cbff6bf41542 20 is_recived = 0;
okini3939 0:cbff6bf41542 21 is_sent = 0;
okini3939 0:cbff6bf41542 22
okini3939 5:72039cd4c874 23 #if defined(TARGET_LPC1768) || defined(TARGET_LPC2368)
okini3939 11:cb132e066057 24 if (p_rx == P0_3) {
okini3939 11:cb132e066057 25 _uart = (LPC_UART_TypeDef*)LPC_UART0;
okini3939 11:cb132e066057 26 NVIC_SetPriority(UART0_IRQn, 1);
okini3939 0:cbff6bf41542 27 } else
okini3939 0:cbff6bf41542 28 if (p_rx == p14) {
okini3939 8:d4a45bba41d2 29 _uart = (LPC_UART_TypeDef*)LPC_UART1;
okini3939 0:cbff6bf41542 30 NVIC_SetPriority(UART1_IRQn, 1);
okini3939 0:cbff6bf41542 31 } else
okini3939 0:cbff6bf41542 32 if (p_rx == p27) {
okini3939 8:d4a45bba41d2 33 _uart = LPC_UART2;
okini3939 0:cbff6bf41542 34 NVIC_SetPriority(UART2_IRQn, 1);
okini3939 11:cb132e066057 35 } else
okini3939 11:cb132e066057 36 if (p_rx == p10) {
okini3939 11:cb132e066057 37 _uart = LPC_UART3;
okini3939 11:cb132e066057 38 NVIC_SetPriority(UART3_IRQn, 1);
okini3939 0:cbff6bf41542 39 }
robodude 13:197c0fea0c62 40 #elif defined(TARGET_LPC4088)
robodude 13:197c0fea0c62 41 // EA LPC4088 QuickStart Board mbed support by Robbie King
robodude 13:197c0fea0c62 42 if (p_rx == P0_3) { // P0_3 ==> mbed "pin 41" on the EA LPC4088 QuickStart Board
robodude 13:197c0fea0c62 43 _uart = (LPC_UART_TypeDef*)LPC_UART0;
robodude 13:197c0fea0c62 44 NVIC_SetPriority(UART0_IRQn, 1);
robodude 13:197c0fea0c62 45 } else
robodude 13:197c0fea0c62 46 if (p_rx == p31) {
robodude 13:197c0fea0c62 47 _uart = (LPC_UART_TypeDef*)LPC_UART4;
robodude 13:197c0fea0c62 48 NVIC_SetPriority(UART4_IRQn, 1);
robodude 13:197c0fea0c62 49 } else
robodude 13:197c0fea0c62 50 if (p_rx == p10) {
robodude 13:197c0fea0c62 51 _uart = LPC_UART3;
robodude 13:197c0fea0c62 52 NVIC_SetPriority(UART3_IRQn, 1);
robodude 13:197c0fea0c62 53 }
okini3939 5:72039cd4c874 54 #elif defined(TARGET_LPC11U24)
okini3939 5:72039cd4c874 55 if (p_rx == p10) {
okini3939 8:d4a45bba41d2 56 _uart = LPC_USART;
okini3939 5:72039cd4c874 57 NVIC_SetPriority(UART_IRQn, 1);
okini3939 5:72039cd4c874 58 }
stanly88 10:b748aab8404c 59 #elif defined(TARGET_LPC11XX)
okini3939 11:cb132e066057 60 // LPC1114 support by Stanly Chen
stanly88 10:b748aab8404c 61 if (p_rx == P1_6) {
stanly88 10:b748aab8404c 62 _uart = (LPC_UART_TypeDef*) UART_0;
stanly88 10:b748aab8404c 63 NVIC_SetPriority(UART_IRQn, 1);
stanly88 10:b748aab8404c 64 }
okini3939 5:72039cd4c874 65 #endif
okini3939 0:cbff6bf41542 66
okini3939 5:72039cd4c874 67 _dmx.baud(250000);
okini3939 5:72039cd4c874 68 _dmx.format(8, Serial::None, 2);
okini3939 5:72039cd4c874 69 _dmx.attach(this, &DMX::int_rx, Serial::RxIrq);
okini3939 0:cbff6bf41542 70
okini3939 4:dd0544c80096 71 // timeout01.attach_us(this, &DMX::int_timer, DMX_TIME_BETWEEN);
okini3939 0:cbff6bf41542 72 }
okini3939 0:cbff6bf41542 73
okini3939 6:9e7b4eeac6ec 74 void DMX::put (int addr, int data) {
okini3939 6:9e7b4eeac6ec 75 if (addr < 0 || addr >= DMX_SIZE) return;
okini3939 6:9e7b4eeac6ec 76 data_tx[addr] = data;
okini3939 0:cbff6bf41542 77 }
okini3939 0:cbff6bf41542 78
okini3939 6:9e7b4eeac6ec 79 void DMX::put (unsigned char *buf, int addr, int len) {
okini3939 6:9e7b4eeac6ec 80 if (addr < 0 || addr >= DMX_SIZE) return;
okini3939 6:9e7b4eeac6ec 81 if (len > DMX_SIZE - addr) len = DMX_SIZE - addr;
okini3939 6:9e7b4eeac6ec 82 memcpy(&data_tx[addr], buf, len);
okini3939 6:9e7b4eeac6ec 83 }
okini3939 6:9e7b4eeac6ec 84
okini3939 6:9e7b4eeac6ec 85 int DMX::get (int addr) {
okini3939 6:9e7b4eeac6ec 86 if (addr < 0 || addr >= DMX_SIZE) return -1;
okini3939 6:9e7b4eeac6ec 87 return data_rx[addr];
okini3939 6:9e7b4eeac6ec 88 }
okini3939 6:9e7b4eeac6ec 89
okini3939 6:9e7b4eeac6ec 90 void DMX::get (unsigned char *buf, int addr, int len) {
okini3939 6:9e7b4eeac6ec 91 if (addr < 0 || addr >= DMX_SIZE) return;
okini3939 6:9e7b4eeac6ec 92 if (len > DMX_SIZE - addr) len = DMX_SIZE - addr;
okini3939 6:9e7b4eeac6ec 93 memcpy(buf, &data_rx[addr], len);
okini3939 0:cbff6bf41542 94 }
okini3939 0:cbff6bf41542 95
okini3939 0:cbff6bf41542 96 void DMX::int_timer () {
okini3939 0:cbff6bf41542 97
okini3939 0:cbff6bf41542 98 switch (mode_tx) {
okini3939 0:cbff6bf41542 99 case DMX_MODE_BEGIN:
okini3939 0:cbff6bf41542 100 // Break Time
okini3939 0:cbff6bf41542 101 timeout01.detach();
okini3939 8:d4a45bba41d2 102 _uart->LCR |= (1 << 6);
okini3939 0:cbff6bf41542 103 mode_tx = DMX_MODE_BREAK;
okini3939 0:cbff6bf41542 104 timeout01.attach_us(this, &DMX::int_timer, DMX_TIME_BREAK);
okini3939 0:cbff6bf41542 105 break;
okini3939 0:cbff6bf41542 106
okini3939 0:cbff6bf41542 107 case DMX_MODE_BREAK:
okini3939 0:cbff6bf41542 108 // Mark After Break
okini3939 0:cbff6bf41542 109 timeout01.detach();
okini3939 8:d4a45bba41d2 110 _uart->LCR &= ~(1 << 6);
okini3939 0:cbff6bf41542 111 mode_tx = DMX_MODE_MAB;
okini3939 0:cbff6bf41542 112 timeout01.attach_us(this, &DMX::int_timer, DMX_TIME_MAB);
okini3939 0:cbff6bf41542 113 break;
okini3939 0:cbff6bf41542 114
okini3939 0:cbff6bf41542 115 case DMX_MODE_MAB:
okini3939 0:cbff6bf41542 116 // Start code
okini3939 0:cbff6bf41542 117 timeout01.detach();
okini3939 0:cbff6bf41542 118 addr_tx = 0;
okini3939 0:cbff6bf41542 119 mode_tx = DMX_MODE_DATA;
okini3939 5:72039cd4c874 120 _dmx.attach(this, &DMX::int_tx, Serial::TxIrq);
okini3939 2:d7677060f8eb 121 #ifdef DMX_UART_DIRECT
okini3939 9:e687f321c428 122 while(!(_uart->LSR & (1<<5)));
okini3939 9:e687f321c428 123 _uart->THR = DMX_START_CODE;
okini3939 2:d7677060f8eb 124 #else
okini3939 9:e687f321c428 125 _dmx.putc(DMX_START_CODE);
okini3939 2:d7677060f8eb 126 #endif
okini3939 0:cbff6bf41542 127 break;
okini3939 0:cbff6bf41542 128 }
okini3939 0:cbff6bf41542 129 }
okini3939 0:cbff6bf41542 130
okini3939 0:cbff6bf41542 131 void DMX::int_tx () {
okini3939 0:cbff6bf41542 132 // Data
okini3939 0:cbff6bf41542 133 if (mode_tx == DMX_MODE_DATA) {
okini3939 0:cbff6bf41542 134 if (addr_tx < DMX_SIZE) {
okini3939 1:f0d988e15810 135 #ifdef DMX_UART_DIRECT
okini3939 8:d4a45bba41d2 136 _uart->THR = (uint8_t)data_tx[addr_tx];
okini3939 0:cbff6bf41542 137 #else
okini3939 5:72039cd4c874 138 _dmx.putc(data_tx[addr_tx]);
okini3939 0:cbff6bf41542 139 #endif
okini3939 0:cbff6bf41542 140 addr_tx ++;
okini3939 0:cbff6bf41542 141 } else {
okini3939 5:72039cd4c874 142 _dmx.attach(0, Serial::TxIrq);
okini3939 0:cbff6bf41542 143 mode_tx = DMX_MODE_BEGIN;
okini3939 0:cbff6bf41542 144 is_sent = 1;
okini3939 0:cbff6bf41542 145 timeout01.attach_us(this, &DMX::int_timer, DMX_TIME_BETWEEN);
okini3939 0:cbff6bf41542 146 }
okini3939 0:cbff6bf41542 147 }
okini3939 0:cbff6bf41542 148 }
okini3939 0:cbff6bf41542 149
okini3939 0:cbff6bf41542 150 void DMX::int_rx () {
okini3939 0:cbff6bf41542 151 int flg, dat;
okini3939 0:cbff6bf41542 152
okini3939 8:d4a45bba41d2 153 flg = _uart->LSR;
okini3939 1:f0d988e15810 154 #ifdef DMX_UART_DIRECT
okini3939 8:d4a45bba41d2 155 dat = _uart->RBR;
okini3939 1:f0d988e15810 156 #else
okini3939 5:72039cd4c874 157 dat = _dmx.getc();
okini3939 1:f0d988e15810 158 #endif
okini3939 0:cbff6bf41542 159
okini3939 0:cbff6bf41542 160 if (flg & ((1 << 7)|(1 << 3)|(1 << 4))) {
okini3939 0:cbff6bf41542 161 // Break Time
okini3939 8:d4a45bba41d2 162 if (addr_rx >= 24) {
okini3939 0:cbff6bf41542 163 is_recived = 1;
okini3939 0:cbff6bf41542 164 }
okini3939 0:cbff6bf41542 165 mode_rx = DMX_MODE_BREAK;
okini3939 0:cbff6bf41542 166 return;
okini3939 0:cbff6bf41542 167 }
okini3939 0:cbff6bf41542 168
okini3939 0:cbff6bf41542 169 if (mode_rx == DMX_MODE_BREAK) {
okini3939 0:cbff6bf41542 170
okini3939 0:cbff6bf41542 171 // Start Code
okini3939 9:e687f321c428 172 if (dat == DMX_START_CODE) {
okini3939 0:cbff6bf41542 173 addr_rx = 0;
okini3939 0:cbff6bf41542 174 mode_rx = DMX_MODE_DATA;
okini3939 0:cbff6bf41542 175 } else {
okini3939 0:cbff6bf41542 176 mode_rx = DMX_MODE_ERROR;
okini3939 0:cbff6bf41542 177 }
okini3939 0:cbff6bf41542 178
okini3939 0:cbff6bf41542 179 } else
okini3939 0:cbff6bf41542 180 if (mode_rx == DMX_MODE_DATA) {
okini3939 0:cbff6bf41542 181
okini3939 0:cbff6bf41542 182 // Data
okini3939 0:cbff6bf41542 183 data_rx[addr_rx] = dat;
okini3939 0:cbff6bf41542 184 addr_rx ++;
okini3939 0:cbff6bf41542 185
okini3939 0:cbff6bf41542 186 if (addr_rx >= DMX_SIZE) {
okini3939 0:cbff6bf41542 187 is_recived = 1;
okini3939 0:cbff6bf41542 188 mode_rx = DMX_MODE_BEGIN;
okini3939 0:cbff6bf41542 189 }
okini3939 0:cbff6bf41542 190 }
okini3939 0:cbff6bf41542 191 }
okini3939 0:cbff6bf41542 192
okini3939 4:dd0544c80096 193 void DMX::start () {
okini3939 4:dd0544c80096 194 if (mode_tx == DMX_MODE_STOP) {
okini3939 4:dd0544c80096 195 mode_tx = DMX_MODE_BEGIN;
okini3939 4:dd0544c80096 196 is_sent = 0;
okini3939 4:dd0544c80096 197 timeout01.attach_us(this, &DMX::int_timer, DMX_TIME_BETWEEN);
okini3939 4:dd0544c80096 198 }
okini3939 4:dd0544c80096 199 }
okini3939 4:dd0544c80096 200
okini3939 4:dd0544c80096 201 void DMX::stop () {
okini3939 5:72039cd4c874 202 _dmx.attach(0, Serial::TxIrq);
okini3939 3:2eb66b4d99bd 203 timeout01.detach();
okini3939 4:dd0544c80096 204 mode_tx = DMX_MODE_STOP;
okini3939 3:2eb66b4d99bd 205 }
okini3939 12:1f176eee2d28 206
okini3939 12:1f176eee2d28 207 void DMX::clear () {
okini3939 12:1f176eee2d28 208 int i;
okini3939 12:1f176eee2d28 209
okini3939 12:1f176eee2d28 210 for (i = 0; i < DMX_SIZE; i ++) {
okini3939 12:1f176eee2d28 211 data_tx[i] = 0;
okini3939 12:1f176eee2d28 212 data_rx[i] = 0;
okini3939 12:1f176eee2d28 213 }
okini3939 12:1f176eee2d28 214 }