Frank 26080115
These are the examples provided for [[/users/frank26080115/libraries/LPC1700CMSIS_Lib/]] Note, the entire "program" is not compilable!
PWM/Match_Interrupt/pwm_match_int.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 pwm_match_int.c |
| frank26080115 | 0:bf7b9fba3924 | 3 | * @purpose PWM match interrupt example |
| 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_pwm.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 PWM_Match_Interrupt Match_Interrupt |
| frank26080115 | 0:bf7b9fba3924 | 25 | * @ingroup PWM_Examples |
| frank26080115 | 0:bf7b9fba3924 | 26 | * @{ |
| frank26080115 | 0:bf7b9fba3924 | 27 | */ |
| frank26080115 | 0:bf7b9fba3924 | 28 | |
| frank26080115 | 0:bf7b9fba3924 | 29 | /************************** PRIVATE DEFINITIONS *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 30 | // Time out definition - used in blocking mode in read/write function |
| frank26080115 | 0:bf7b9fba3924 | 31 | #define TIME_OUT 10000 |
| frank26080115 | 0:bf7b9fba3924 | 32 | |
| frank26080115 | 0:bf7b9fba3924 | 33 | |
| frank26080115 | 0:bf7b9fba3924 | 34 | /************************** PRIVATE VARIABLES *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 35 | __IO uint32_t match_cnt = 0; |
| frank26080115 | 0:bf7b9fba3924 | 36 | __IO uint32_t long_duty = 0; |
| frank26080115 | 0:bf7b9fba3924 | 37 | |
| frank26080115 | 0:bf7b9fba3924 | 38 | /************************** PRIVATE FUNCTIONS *************************/ |
| frank26080115 | 0:bf7b9fba3924 | 39 | /* Interrupt service routine */ |
| frank26080115 | 0:bf7b9fba3924 | 40 | void PWM1_IRQHandler(void); |
| frank26080115 | 0:bf7b9fba3924 | 41 | |
| frank26080115 | 0:bf7b9fba3924 | 42 | /*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 43 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 44 | * @brief GPDMA interrupt handler sub-routine |
| frank26080115 | 0:bf7b9fba3924 | 45 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 46 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 47 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 48 | void PWM1_IRQHandler(void) |
| frank26080115 | 0:bf7b9fba3924 | 49 | { |
| frank26080115 | 0:bf7b9fba3924 | 50 | /* Check whether if match flag for channel 0 is set or not */ |
| frank26080115 | 0:bf7b9fba3924 | 51 | if (PWM_GetIntStatus(LPC_PWM1, PWM_INTSTAT_MR0)) |
| frank26080115 | 0:bf7b9fba3924 | 52 | { |
| frank26080115 | 0:bf7b9fba3924 | 53 | match_cnt++; |
| frank26080115 | 0:bf7b9fba3924 | 54 | /* Clear the interrupt flag */ |
| frank26080115 | 0:bf7b9fba3924 | 55 | PWM_ClearIntPending(LPC_PWM1, PWM_INTSTAT_MR0); |
| frank26080115 | 0:bf7b9fba3924 | 56 | } |
| frank26080115 | 0:bf7b9fba3924 | 57 | } |
| frank26080115 | 0:bf7b9fba3924 | 58 | |
| frank26080115 | 0:bf7b9fba3924 | 59 | |
| frank26080115 | 0:bf7b9fba3924 | 60 | /*-------------------------MAIN FUNCTION------------------------------*/ |
| frank26080115 | 0:bf7b9fba3924 | 61 | /*********************************************************************//** |
| frank26080115 | 0:bf7b9fba3924 | 62 | * @brief c_entry: Main PWM program body |
| frank26080115 | 0:bf7b9fba3924 | 63 | * @param[in] None |
| frank26080115 | 0:bf7b9fba3924 | 64 | * @return int |
| frank26080115 | 0:bf7b9fba3924 | 65 | **********************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 66 | int c_entry(void) |
| frank26080115 | 0:bf7b9fba3924 | 67 | { |
| frank26080115 | 0:bf7b9fba3924 | 68 | uint8_t temp, temp2; |
| frank26080115 | 0:bf7b9fba3924 | 69 | PWM_TIMERCFG_Type PWMCfgDat; |
| frank26080115 | 0:bf7b9fba3924 | 70 | PWM_MATCHCFG_Type PWMMatchCfgDat; |
| frank26080115 | 0:bf7b9fba3924 | 71 | PINSEL_CFG_Type PinCfg; |
| frank26080115 | 0:bf7b9fba3924 | 72 | |
| frank26080115 | 0:bf7b9fba3924 | 73 | /* PWM block section -------------------------------------------- */ |
| frank26080115 | 0:bf7b9fba3924 | 74 | /* Initialize PWM peripheral, timer mode |
| frank26080115 | 0:bf7b9fba3924 | 75 | * PWM prescale value = 1 (absolute value - tick value) */ |
| frank26080115 | 0:bf7b9fba3924 | 76 | PWMCfgDat.PrescaleOption = PWM_TIMER_PRESCALE_TICKVAL; |
| frank26080115 | 0:bf7b9fba3924 | 77 | PWMCfgDat.PrescaleValue = 1; |
| frank26080115 | 0:bf7b9fba3924 | 78 | PWM_Init(LPC_PWM1, PWM_MODE_TIMER, (void *) &PWMCfgDat); |
| frank26080115 | 0:bf7b9fba3924 | 79 | |
| frank26080115 | 0:bf7b9fba3924 | 80 | /* |
| frank26080115 | 0:bf7b9fba3924 | 81 | * Initialize PWM pin connect |
| frank26080115 | 0:bf7b9fba3924 | 82 | */ |
| frank26080115 | 0:bf7b9fba3924 | 83 | PinCfg.Funcnum = 1; |
| frank26080115 | 0:bf7b9fba3924 | 84 | PinCfg.OpenDrain = 0; |
| frank26080115 | 0:bf7b9fba3924 | 85 | PinCfg.Pinmode = 0; |
| frank26080115 | 0:bf7b9fba3924 | 86 | PinCfg.Portnum = 2; |
| frank26080115 | 0:bf7b9fba3924 | 87 | for (temp = 0; temp <= 6; temp++){ |
| frank26080115 | 0:bf7b9fba3924 | 88 | PinCfg.Pinnum = temp; |
| frank26080115 | 0:bf7b9fba3924 | 89 | PINSEL_ConfigPin(&PinCfg); |
| frank26080115 | 0:bf7b9fba3924 | 90 | } |
| frank26080115 | 0:bf7b9fba3924 | 91 | |
| frank26080115 | 0:bf7b9fba3924 | 92 | |
| frank26080115 | 0:bf7b9fba3924 | 93 | /* Set match value for PWM match channel 0 = 256, update immediately */ |
| frank26080115 | 0:bf7b9fba3924 | 94 | PWM_MatchUpdate(LPC_PWM1, 0, 256, PWM_MATCH_UPDATE_NOW); |
| frank26080115 | 0:bf7b9fba3924 | 95 | /* PWM Timer/Counter will be reset when channel 0 matching |
| frank26080115 | 0:bf7b9fba3924 | 96 | * Enable interrupt when match |
| frank26080115 | 0:bf7b9fba3924 | 97 | * no stop when match */ |
| frank26080115 | 0:bf7b9fba3924 | 98 | PWMMatchCfgDat.IntOnMatch = ENABLE; |
| frank26080115 | 0:bf7b9fba3924 | 99 | PWMMatchCfgDat.MatchChannel = 0; |
| frank26080115 | 0:bf7b9fba3924 | 100 | PWMMatchCfgDat.ResetOnMatch = ENABLE; |
| frank26080115 | 0:bf7b9fba3924 | 101 | PWMMatchCfgDat.StopOnMatch = DISABLE; |
| frank26080115 | 0:bf7b9fba3924 | 102 | PWM_ConfigMatch(LPC_PWM1, &PWMMatchCfgDat); |
| frank26080115 | 0:bf7b9fba3924 | 103 | |
| frank26080115 | 0:bf7b9fba3924 | 104 | /* Configure each PWM channel: --------------------------------------------- */ |
| frank26080115 | 0:bf7b9fba3924 | 105 | /* - Single edge |
| frank26080115 | 0:bf7b9fba3924 | 106 | * - PWM Duty on each PWM channel determined by |
| frank26080115 | 0:bf7b9fba3924 | 107 | * the match on channel 0 to the match of that match channel. |
| frank26080115 | 0:bf7b9fba3924 | 108 | * Example: PWM Duty on PWM channel 1 determined by |
| frank26080115 | 0:bf7b9fba3924 | 109 | * the match on channel 0 to the match of match channel 1. |
| frank26080115 | 0:bf7b9fba3924 | 110 | */ |
| frank26080115 | 0:bf7b9fba3924 | 111 | |
| frank26080115 | 0:bf7b9fba3924 | 112 | /* Configure PWM channel edge option |
| frank26080115 | 0:bf7b9fba3924 | 113 | * Note: PWM Channel 1 is in single mode as default state and |
| frank26080115 | 0:bf7b9fba3924 | 114 | * can not be changed to double edge mode */ |
| frank26080115 | 0:bf7b9fba3924 | 115 | for (temp = 2; temp < 7; temp++) |
| frank26080115 | 0:bf7b9fba3924 | 116 | { |
| frank26080115 | 0:bf7b9fba3924 | 117 | PWM_ChannelConfig(LPC_PWM1, temp, PWM_CHANNEL_SINGLE_EDGE); |
| frank26080115 | 0:bf7b9fba3924 | 118 | } |
| frank26080115 | 0:bf7b9fba3924 | 119 | |
| frank26080115 | 0:bf7b9fba3924 | 120 | /* Setting interrupt for PWM ---------------------------------------------- */ |
| frank26080115 | 0:bf7b9fba3924 | 121 | /* Disable PWM interrupt */ |
| frank26080115 | 0:bf7b9fba3924 | 122 | NVIC_DisableIRQ(PWM1_IRQn); |
| frank26080115 | 0:bf7b9fba3924 | 123 | /* preemption = 1, sub-priority = 1 */ |
| frank26080115 | 0:bf7b9fba3924 | 124 | NVIC_SetPriority(PWM1_IRQn, ((0x01<<3)|0x01)); |
| frank26080115 | 0:bf7b9fba3924 | 125 | |
| frank26080115 | 0:bf7b9fba3924 | 126 | /* Configure match value for each match channel */ |
| frank26080115 | 0:bf7b9fba3924 | 127 | temp2 = 10; |
| frank26080115 | 0:bf7b9fba3924 | 128 | for (temp = 1; temp < 7; temp++) |
| frank26080115 | 0:bf7b9fba3924 | 129 | { |
| frank26080115 | 0:bf7b9fba3924 | 130 | /* Set up match value */ |
| frank26080115 | 0:bf7b9fba3924 | 131 | PWM_MatchUpdate(LPC_PWM1, temp, temp2, PWM_MATCH_UPDATE_NOW); |
| frank26080115 | 0:bf7b9fba3924 | 132 | /* Configure match option */ |
| frank26080115 | 0:bf7b9fba3924 | 133 | PWMMatchCfgDat.IntOnMatch = DISABLE; |
| frank26080115 | 0:bf7b9fba3924 | 134 | PWMMatchCfgDat.MatchChannel = temp; |
| frank26080115 | 0:bf7b9fba3924 | 135 | PWMMatchCfgDat.ResetOnMatch = DISABLE; |
| frank26080115 | 0:bf7b9fba3924 | 136 | PWMMatchCfgDat.StopOnMatch = DISABLE; |
| frank26080115 | 0:bf7b9fba3924 | 137 | PWM_ConfigMatch(LPC_PWM1, &PWMMatchCfgDat); |
| frank26080115 | 0:bf7b9fba3924 | 138 | /* Enable PWM Channel Output */ |
| frank26080115 | 0:bf7b9fba3924 | 139 | PWM_ChannelCmd(LPC_PWM1, temp, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 140 | /* Increase match value by 10 */ |
| frank26080115 | 0:bf7b9fba3924 | 141 | temp2 += 10; |
| frank26080115 | 0:bf7b9fba3924 | 142 | } |
| frank26080115 | 0:bf7b9fba3924 | 143 | |
| frank26080115 | 0:bf7b9fba3924 | 144 | /* Enable PWM interrupt */ |
| frank26080115 | 0:bf7b9fba3924 | 145 | NVIC_EnableIRQ(PWM1_IRQn); |
| frank26080115 | 0:bf7b9fba3924 | 146 | |
| frank26080115 | 0:bf7b9fba3924 | 147 | /* Reset and Start counter */ |
| frank26080115 | 0:bf7b9fba3924 | 148 | PWM_ResetCounter(LPC_PWM1); |
| frank26080115 | 0:bf7b9fba3924 | 149 | PWM_CounterCmd(LPC_PWM1, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 150 | |
| frank26080115 | 0:bf7b9fba3924 | 151 | /* Start PWM now */ |
| frank26080115 | 0:bf7b9fba3924 | 152 | PWM_Cmd(LPC_PWM1, ENABLE); |
| frank26080115 | 0:bf7b9fba3924 | 153 | |
| frank26080115 | 0:bf7b9fba3924 | 154 | // Update PWM1.1 every 0x1000 match interrupt |
| frank26080115 | 0:bf7b9fba3924 | 155 | while (1) |
| frank26080115 | 0:bf7b9fba3924 | 156 | { |
| frank26080115 | 0:bf7b9fba3924 | 157 | if (match_cnt >= 0x1000) { |
| frank26080115 | 0:bf7b9fba3924 | 158 | match_cnt = 0; |
| frank26080115 | 0:bf7b9fba3924 | 159 | long_duty++; |
| frank26080115 | 0:bf7b9fba3924 | 160 | if (long_duty >= 256) { |
| frank26080115 | 0:bf7b9fba3924 | 161 | // Reset duty |
| frank26080115 | 0:bf7b9fba3924 | 162 | long_duty = 0; |
| frank26080115 | 0:bf7b9fba3924 | 163 | // Print info |
| frank26080115 | 0:bf7b9fba3924 | 164 | //UART_Puts_(uartdev, "PWM1.1 is reset!"); |
| frank26080115 | 0:bf7b9fba3924 | 165 | } |
| frank26080115 | 0:bf7b9fba3924 | 166 | |
| frank26080115 | 0:bf7b9fba3924 | 167 | // Update PWM1.1 duty |
| frank26080115 | 0:bf7b9fba3924 | 168 | PWM_MatchUpdate(LPC_PWM1, 1, long_duty, PWM_MATCH_UPDATE_NOW); |
| frank26080115 | 0:bf7b9fba3924 | 169 | } |
| frank26080115 | 0:bf7b9fba3924 | 170 | } |
| frank26080115 | 0:bf7b9fba3924 | 171 | return 1; |
| frank26080115 | 0:bf7b9fba3924 | 172 | } |
| frank26080115 | 0:bf7b9fba3924 | 173 | |
| frank26080115 | 0:bf7b9fba3924 | 174 | /* With ARM and GHS toolsets, the entry point is main() - this will |
| frank26080115 | 0:bf7b9fba3924 | 175 | allow the linker to generate wrapper code to setup stacks, allocate |
| frank26080115 | 0:bf7b9fba3924 | 176 | heap area, and initialize and copy code and data segments. For GNU |
| frank26080115 | 0:bf7b9fba3924 | 177 | toolsets, the entry point is through __start() in the crt0_gnu.asm |
| frank26080115 | 0:bf7b9fba3924 | 178 | file, and that startup code will setup stacks and data */ |
| frank26080115 | 0:bf7b9fba3924 | 179 | int main(void) |
| frank26080115 | 0:bf7b9fba3924 | 180 | { |
| frank26080115 | 0:bf7b9fba3924 | 181 | return c_entry(); |
| frank26080115 | 0:bf7b9fba3924 | 182 | } |
| frank26080115 | 0:bf7b9fba3924 | 183 | |
| frank26080115 | 0:bf7b9fba3924 | 184 | |
| frank26080115 | 0:bf7b9fba3924 | 185 | #ifdef DEBUG |
| frank26080115 | 0:bf7b9fba3924 | 186 | /******************************************************************************* |
| frank26080115 | 0:bf7b9fba3924 | 187 | * @brief Reports the name of the source file and the source line number |
| frank26080115 | 0:bf7b9fba3924 | 188 | * where the CHECK_PARAM error has occurred. |
| frank26080115 | 0:bf7b9fba3924 | 189 | * @param[in] file Pointer to the source file name |
| frank26080115 | 0:bf7b9fba3924 | 190 | * @param[in] line assert_param error line source number |
| frank26080115 | 0:bf7b9fba3924 | 191 | * @return None |
| frank26080115 | 0:bf7b9fba3924 | 192 | *******************************************************************************/ |
| frank26080115 | 0:bf7b9fba3924 | 193 | void check_failed(uint8_t *file, uint32_t line) |
| frank26080115 | 0:bf7b9fba3924 | 194 | { |
| frank26080115 | 0:bf7b9fba3924 | 195 | /* User can add his own implementation to report the file name and line number, |
| frank26080115 | 0:bf7b9fba3924 | 196 | ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ |
| frank26080115 | 0:bf7b9fba3924 | 197 | |
| frank26080115 | 0:bf7b9fba3924 | 198 | /* Infinite loop */ |
| frank26080115 | 0:bf7b9fba3924 | 199 | while(1); |
| frank26080115 | 0:bf7b9fba3924 | 200 | } |
| frank26080115 | 0:bf7b9fba3924 | 201 | #endif |
| frank26080115 | 0:bf7b9fba3924 | 202 | |
| frank26080115 | 0:bf7b9fba3924 | 203 | /* |
| frank26080115 | 0:bf7b9fba3924 | 204 | * @} |
| frank26080115 | 0:bf7b9fba3924 | 205 | */ |