Library used during 1 day workshops presented by Skool and ARM Hungary in 2015.
Fork of Skool_wkshp_lib2015 by
keypad.cpp@1:68d1a8c4970b, 2015-10-01 (annotated)
- Committer:
- lvagasi
- Date:
- Thu Oct 01 19:17:25 2015 +0000
- Revision:
- 1:68d1a8c4970b
- Parent:
- 0:3ad0af8abf43
Almost complete version. Functionally working. Sometimes some keys are repeated. There is no value check.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
lvagasi | 0:3ad0af8abf43 | 1 | #include "mbed.h" |
lvagasi | 0:3ad0af8abf43 | 2 | #include "keypad.h" |
lvagasi | 0:3ad0af8abf43 | 3 | |
lvagasi | 0:3ad0af8abf43 | 4 | GPIO_InitTypeDef keypadInit; |
lvagasi | 0:3ad0af8abf43 | 5 | volatile uint32_t Index = 0xFF; |
lvagasi | 0:3ad0af8abf43 | 6 | volatile uint32_t new_key = 0; |
lvagasi | 0:3ad0af8abf43 | 7 | |
lvagasi | 0:3ad0af8abf43 | 8 | |
lvagasi | 0:3ad0af8abf43 | 9 | void EXTI9_5_IRQHandler(void) { |
lvagasi | 0:3ad0af8abf43 | 10 | HAL_NVIC_DisableIRQ(EXTI9_5_IRQn); |
lvagasi | 0:3ad0af8abf43 | 11 | if (__HAL_GPIO_EXTI_GET_IT(GPIO_PIN_5) != 0) { |
lvagasi | 0:3ad0af8abf43 | 12 | __HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_5); |
lvagasi | 0:3ad0af8abf43 | 13 | HAL_GPIO_EXTI_Callback(0); |
lvagasi | 0:3ad0af8abf43 | 14 | } else if (__HAL_GPIO_EXTI_GET_IT(GPIO_PIN_6) != 0) { |
lvagasi | 0:3ad0af8abf43 | 15 | __HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_6); |
lvagasi | 0:3ad0af8abf43 | 16 | HAL_GPIO_EXTI_Callback(1); |
lvagasi | 0:3ad0af8abf43 | 17 | } else if (__HAL_GPIO_EXTI_GET_IT(GPIO_PIN_7) != 0) { |
lvagasi | 0:3ad0af8abf43 | 18 | __HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_7); |
lvagasi | 0:3ad0af8abf43 | 19 | HAL_GPIO_EXTI_Callback(4); |
lvagasi | 0:3ad0af8abf43 | 20 | } else if (__HAL_GPIO_EXTI_GET_IT(GPIO_PIN_8) != 0) { |
lvagasi | 0:3ad0af8abf43 | 21 | __HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_8); |
lvagasi | 0:3ad0af8abf43 | 22 | HAL_GPIO_EXTI_Callback(2); |
lvagasi | 0:3ad0af8abf43 | 23 | } else if (__HAL_GPIO_EXTI_GET_IT(GPIO_PIN_9) != 0) { |
lvagasi | 0:3ad0af8abf43 | 24 | __HAL_GPIO_EXTI_CLEAR_IT(GPIO_PIN_9); |
lvagasi | 0:3ad0af8abf43 | 25 | HAL_GPIO_EXTI_Callback(3); |
lvagasi | 0:3ad0af8abf43 | 26 | } |
lvagasi | 0:3ad0af8abf43 | 27 | HAL_GPIO_WritePin(GPIOC, cols[0] | cols[1] | cols[2], GPIO_PIN_RESET); // All cols are driven Low for resume IRQ operation |
lvagasi | 0:3ad0af8abf43 | 28 | HAL_NVIC_ClearPendingIRQ(EXTI9_5_IRQn); |
lvagasi | 0:3ad0af8abf43 | 29 | } |
lvagasi | 0:3ad0af8abf43 | 30 | |
lvagasi | 0:3ad0af8abf43 | 31 | void HAL_GPIO_EXTI_Callback(uint16_t pin) { |
lvagasi | 0:3ad0af8abf43 | 32 | int col; |
lvagasi | 0:3ad0af8abf43 | 33 | int temp; |
lvagasi | 0:3ad0af8abf43 | 34 | |
lvagasi | 0:3ad0af8abf43 | 35 | keypadInit.Pin = rows[0] | rows[1] | rows[2] | rows[3]; |
lvagasi | 0:3ad0af8abf43 | 36 | keypadInit.Mode = GPIO_MODE_INPUT; |
lvagasi | 0:3ad0af8abf43 | 37 | keypadInit.Pull = GPIO_PULLUP; |
lvagasi | 0:3ad0af8abf43 | 38 | HAL_GPIO_Init(GPIOC, &keypadInit); |
lvagasi | 0:3ad0af8abf43 | 39 | for (col = 0; col < ncols; col++) { |
lvagasi | 0:3ad0af8abf43 | 40 | HAL_GPIO_WritePin(GPIOC, cols[0] | cols[1] | cols[2], GPIO_PIN_SET); // All cols are driven High |
lvagasi | 0:3ad0af8abf43 | 41 | HAL_GPIO_WritePin(GPIOC, cols[col], GPIO_PIN_RESET); // 1 col is driven Low |
lvagasi | 0:3ad0af8abf43 | 42 | wait_ms(25); |
lvagasi | 0:3ad0af8abf43 | 43 | temp = (GPIOC->IDR & 0x0360); |
lvagasi | 0:3ad0af8abf43 | 44 | switch (temp) { |
lvagasi | 0:3ad0af8abf43 | 45 | case 0x0340: Index = col; |
lvagasi | 0:3ad0af8abf43 | 46 | break; |
lvagasi | 0:3ad0af8abf43 | 47 | case 0x0320: Index = 4 + col; |
lvagasi | 0:3ad0af8abf43 | 48 | break; |
lvagasi | 0:3ad0af8abf43 | 49 | case 0x0260: Index = 8 + col; |
lvagasi | 0:3ad0af8abf43 | 50 | break; |
lvagasi | 0:3ad0af8abf43 | 51 | case 0x0160: Index = 12 + col; |
lvagasi | 0:3ad0af8abf43 | 52 | break; |
lvagasi | 0:3ad0af8abf43 | 53 | default: Index = 0xFF; |
lvagasi | 0:3ad0af8abf43 | 54 | break; |
lvagasi | 0:3ad0af8abf43 | 55 | } |
lvagasi | 0:3ad0af8abf43 | 56 | if (Index != 0xFF) { |
lvagasi | 0:3ad0af8abf43 | 57 | break; |
lvagasi | 0:3ad0af8abf43 | 58 | } |
lvagasi | 0:3ad0af8abf43 | 59 | } |
lvagasi | 0:3ad0af8abf43 | 60 | // Wait for the release of the key |
lvagasi | 0:3ad0af8abf43 | 61 | while ((GPIOC->IDR & 0x0360) != 0x0360) {} |
lvagasi | 0:3ad0af8abf43 | 62 | new_key++; |
lvagasi | 0:3ad0af8abf43 | 63 | } |
lvagasi | 0:3ad0af8abf43 | 64 | |
lvagasi | 0:3ad0af8abf43 | 65 | void Init_keypad(void) { |
lvagasi | 0:3ad0af8abf43 | 66 | __GPIOC_CLK_ENABLE(); |
lvagasi | 0:3ad0af8abf43 | 67 | keypadInit.Pin = cols[0] | cols[1] | cols[2]; |
lvagasi | 0:3ad0af8abf43 | 68 | keypadInit.Mode = GPIO_MODE_OUTPUT_OD; |
lvagasi | 0:3ad0af8abf43 | 69 | keypadInit.Pull = GPIO_NOPULL; |
lvagasi | 0:3ad0af8abf43 | 70 | keypadInit.Speed = GPIO_SPEED_MEDIUM; |
lvagasi | 0:3ad0af8abf43 | 71 | HAL_GPIO_Init(GPIOC, &keypadInit); |
lvagasi | 0:3ad0af8abf43 | 72 | |
lvagasi | 0:3ad0af8abf43 | 73 | HAL_GPIO_WritePin(GPIOC, cols[0] | cols[1] | cols[2], GPIO_PIN_SET); |
lvagasi | 0:3ad0af8abf43 | 74 | HAL_GPIO_WritePin(GPIOC, cols[2], GPIO_PIN_RESET); |
lvagasi | 0:3ad0af8abf43 | 75 | |
lvagasi | 0:3ad0af8abf43 | 76 | keypadInit.Pin = rows[0] | rows[1] | rows[2] | rows[3]; |
lvagasi | 0:3ad0af8abf43 | 77 | keypadInit.Mode = GPIO_MODE_INPUT; |
lvagasi | 0:3ad0af8abf43 | 78 | keypadInit.Pull = GPIO_PULLUP; |
lvagasi | 0:3ad0af8abf43 | 79 | HAL_GPIO_Init(GPIOC, &keypadInit); |
lvagasi | 0:3ad0af8abf43 | 80 | keypadInit.Pin = rows[3]; |
lvagasi | 0:3ad0af8abf43 | 81 | keypadInit.Mode = GPIO_MODE_IT_FALLING; |
lvagasi | 0:3ad0af8abf43 | 82 | keypadInit.Pull = GPIO_PULLUP; |
lvagasi | 0:3ad0af8abf43 | 83 | HAL_GPIO_Init(GPIOC, &keypadInit); |
lvagasi | 0:3ad0af8abf43 | 84 | NVIC_SetVector(EXTI9_5_IRQn, (uint32_t)EXTI9_5_IRQHandler); |
lvagasi | 0:3ad0af8abf43 | 85 | HAL_NVIC_EnableIRQ(EXTI9_5_IRQn); |
lvagasi | 0:3ad0af8abf43 | 86 | } |
lvagasi | 0:3ad0af8abf43 | 87 | |
lvagasi | 0:3ad0af8abf43 | 88 | int Poll_keypad_vert(void) { |
lvagasi | 0:3ad0af8abf43 | 89 | int temp; |
lvagasi | 0:3ad0af8abf43 | 90 | int retval = 0xFF; |
lvagasi | 0:3ad0af8abf43 | 91 | |
lvagasi | 0:3ad0af8abf43 | 92 | keypadInit.Pin = rows[0] | rows[1] | rows[2] | rows[3]; |
lvagasi | 0:3ad0af8abf43 | 93 | keypadInit.Mode = GPIO_MODE_INPUT; |
lvagasi | 0:3ad0af8abf43 | 94 | keypadInit.Pull = GPIO_PULLUP; |
lvagasi | 0:3ad0af8abf43 | 95 | HAL_GPIO_Init(GPIOC, &keypadInit); |
lvagasi | 0:3ad0af8abf43 | 96 | //Poll the keys |
lvagasi | 0:3ad0af8abf43 | 97 | while (retval == 0xFF) { |
lvagasi | 0:3ad0af8abf43 | 98 | HAL_GPIO_WritePin(GPIOC, cols[0] | cols[1] | cols[2], GPIO_PIN_SET); |
lvagasi | 0:3ad0af8abf43 | 99 | HAL_GPIO_WritePin(GPIOC, cols[1], GPIO_PIN_RESET); |
lvagasi | 0:3ad0af8abf43 | 100 | wait_ms(25); |
lvagasi | 1:68d1a8c4970b | 101 | temp = (GPIOC->IDR & 0x0360); |
lvagasi | 0:3ad0af8abf43 | 102 | switch (temp) { |
lvagasi | 1:68d1a8c4970b | 103 | case 0x0340: retval = 0x01; |
lvagasi | 0:3ad0af8abf43 | 104 | break; |
lvagasi | 1:68d1a8c4970b | 105 | case 0x0320: retval = 0x05; |
lvagasi | 0:3ad0af8abf43 | 106 | break; |
lvagasi | 1:68d1a8c4970b | 107 | case 0x0260: retval = 0x09; |
lvagasi | 1:68d1a8c4970b | 108 | break; |
lvagasi | 1:68d1a8c4970b | 109 | case 0x0160: retval = 0x0D; |
lvagasi | 0:3ad0af8abf43 | 110 | break; |
lvagasi | 0:3ad0af8abf43 | 111 | default: retval = 0xFF; |
lvagasi | 0:3ad0af8abf43 | 112 | break; |
lvagasi | 0:3ad0af8abf43 | 113 | } |
lvagasi | 0:3ad0af8abf43 | 114 | HAL_GPIO_WritePin(GPIOC, cols[0] | cols[1] | cols[2], GPIO_PIN_SET); |
lvagasi | 0:3ad0af8abf43 | 115 | HAL_GPIO_WritePin(GPIOC, cols[2], GPIO_PIN_RESET); |
lvagasi | 0:3ad0af8abf43 | 116 | wait_ms(25); |
lvagasi | 1:68d1a8c4970b | 117 | temp = (GPIOC->IDR & 0x0360); |
lvagasi | 1:68d1a8c4970b | 118 | if (temp == 0x0160) {retval = 0x0E;} |
lvagasi | 0:3ad0af8abf43 | 119 | } |
lvagasi | 0:3ad0af8abf43 | 120 | // Wait for the release of the key |
lvagasi | 0:3ad0af8abf43 | 121 | HAL_GPIO_WritePin(GPIOC, cols[0] | cols[1] | cols[2], GPIO_PIN_SET); |
lvagasi | 0:3ad0af8abf43 | 122 | if (retval < 0x0E) { |
lvagasi | 0:3ad0af8abf43 | 123 | HAL_GPIO_WritePin(GPIOC, cols[1], GPIO_PIN_RESET); |
lvagasi | 0:3ad0af8abf43 | 124 | } else { |
lvagasi | 0:3ad0af8abf43 | 125 | HAL_GPIO_WritePin(GPIOC, cols[2], GPIO_PIN_RESET); |
lvagasi | 0:3ad0af8abf43 | 126 | } |
lvagasi | 0:3ad0af8abf43 | 127 | while ((GPIOC->IDR & 0x0360) != 0x0360) {} |
lvagasi | 0:3ad0af8abf43 | 128 | return retval; |
lvagasi | 0:3ad0af8abf43 | 129 | } |
lvagasi | 0:3ad0af8abf43 | 130 | |
lvagasi | 0:3ad0af8abf43 | 131 | int Poll_keypad_yesno(void) { |
lvagasi | 0:3ad0af8abf43 | 132 | int retval = 0xFF; |
lvagasi | 0:3ad0af8abf43 | 133 | |
lvagasi | 0:3ad0af8abf43 | 134 | keypadInit.Pin = rows[0] | rows[1] | rows[2] | rows[3]; |
lvagasi | 0:3ad0af8abf43 | 135 | keypadInit.Mode = GPIO_MODE_INPUT; |
lvagasi | 0:3ad0af8abf43 | 136 | keypadInit.Pull = GPIO_PULLUP; |
lvagasi | 0:3ad0af8abf43 | 137 | HAL_GPIO_Init(GPIOC, &keypadInit); |
lvagasi | 0:3ad0af8abf43 | 138 | |
lvagasi | 0:3ad0af8abf43 | 139 | while (retval == 0xFF) { |
lvagasi | 0:3ad0af8abf43 | 140 | HAL_GPIO_WritePin(GPIOC, cols[0] | cols[1] | cols[2], GPIO_PIN_SET); |
lvagasi | 0:3ad0af8abf43 | 141 | HAL_GPIO_WritePin(GPIOC, cols[0], GPIO_PIN_RESET); |
lvagasi | 0:3ad0af8abf43 | 142 | wait_ms(25); |
lvagasi | 0:3ad0af8abf43 | 143 | if ((GPIOC->IDR & 0x0200) == 0x0000) retval = 0x0C; |
lvagasi | 0:3ad0af8abf43 | 144 | HAL_GPIO_WritePin(GPIOC, cols[0] | cols[1] | cols[2], GPIO_PIN_SET); |
lvagasi | 0:3ad0af8abf43 | 145 | HAL_GPIO_WritePin(GPIOC, cols[2], GPIO_PIN_RESET); |
lvagasi | 0:3ad0af8abf43 | 146 | wait_ms(25); |
lvagasi | 0:3ad0af8abf43 | 147 | if ((GPIOC->IDR & 0x0200) == 0x0000) retval = 0x0E; |
lvagasi | 0:3ad0af8abf43 | 148 | } |
lvagasi | 0:3ad0af8abf43 | 149 | // Wait for the release of the key |
lvagasi | 0:3ad0af8abf43 | 150 | HAL_GPIO_WritePin(GPIOC, cols[0] | cols[1] | cols[2], GPIO_PIN_SET); |
lvagasi | 0:3ad0af8abf43 | 151 | if (retval == 0x0C) { |
lvagasi | 0:3ad0af8abf43 | 152 | HAL_GPIO_WritePin(GPIOC, cols[0], GPIO_PIN_RESET); |
lvagasi | 0:3ad0af8abf43 | 153 | } else { |
lvagasi | 0:3ad0af8abf43 | 154 | HAL_GPIO_WritePin(GPIOC, cols[2], GPIO_PIN_RESET); |
lvagasi | 0:3ad0af8abf43 | 155 | } |
lvagasi | 0:3ad0af8abf43 | 156 | while ((GPIOC->IDR & 0x0360) != 0x0360) {} |
lvagasi | 0:3ad0af8abf43 | 157 | return retval; |
lvagasi | 0:3ad0af8abf43 | 158 | } |
lvagasi | 0:3ad0af8abf43 | 159 | |
lvagasi | 0:3ad0af8abf43 | 160 | int Poll_keypad_full(void) { |
lvagasi | 0:3ad0af8abf43 | 161 | int col, temp; |
lvagasi | 0:3ad0af8abf43 | 162 | int retval = 0xFF; |
lvagasi | 0:3ad0af8abf43 | 163 | |
lvagasi | 0:3ad0af8abf43 | 164 | keypadInit.Pin = rows[0] | rows[1] | rows[2] | rows[3]; |
lvagasi | 0:3ad0af8abf43 | 165 | keypadInit.Mode = GPIO_MODE_INPUT; |
lvagasi | 0:3ad0af8abf43 | 166 | keypadInit.Pull = GPIO_PULLUP; |
lvagasi | 0:3ad0af8abf43 | 167 | HAL_GPIO_Init(GPIOC, &keypadInit); |
lvagasi | 0:3ad0af8abf43 | 168 | //Poll the keys |
lvagasi | 0:3ad0af8abf43 | 169 | while (retval == 0xFF) { |
lvagasi | 0:3ad0af8abf43 | 170 | for (col = 0; col < ncols; col++) { |
lvagasi | 0:3ad0af8abf43 | 171 | HAL_GPIO_WritePin(GPIOC, cols[0] | cols[1] | cols[2], GPIO_PIN_SET); // All cols are driven High |
lvagasi | 0:3ad0af8abf43 | 172 | HAL_GPIO_WritePin(GPIOC, cols[col], GPIO_PIN_RESET); // 1 col is driven Low |
lvagasi | 0:3ad0af8abf43 | 173 | wait_ms(25); |
lvagasi | 0:3ad0af8abf43 | 174 | temp = (GPIOC->IDR & 0x0360); |
lvagasi | 0:3ad0af8abf43 | 175 | switch (temp) { |
lvagasi | 0:3ad0af8abf43 | 176 | case 0x0340: retval = col; |
lvagasi | 0:3ad0af8abf43 | 177 | break; |
lvagasi | 0:3ad0af8abf43 | 178 | case 0x0320: retval = 4 + col; |
lvagasi | 0:3ad0af8abf43 | 179 | break; |
lvagasi | 0:3ad0af8abf43 | 180 | case 0x0260: retval = 8 + col; |
lvagasi | 0:3ad0af8abf43 | 181 | break; |
lvagasi | 0:3ad0af8abf43 | 182 | case 0x0160: retval = 12 + col; |
lvagasi | 0:3ad0af8abf43 | 183 | break; |
lvagasi | 0:3ad0af8abf43 | 184 | default: retval = 0xFF; |
lvagasi | 0:3ad0af8abf43 | 185 | break; |
lvagasi | 0:3ad0af8abf43 | 186 | } |
lvagasi | 0:3ad0af8abf43 | 187 | if (retval != 0xFF) { |
lvagasi | 0:3ad0af8abf43 | 188 | break; |
lvagasi | 0:3ad0af8abf43 | 189 | } |
lvagasi | 0:3ad0af8abf43 | 190 | } |
lvagasi | 0:3ad0af8abf43 | 191 | } |
lvagasi | 0:3ad0af8abf43 | 192 | // Wait for the release of the key |
lvagasi | 0:3ad0af8abf43 | 193 | while ((GPIOC->IDR & 0x0360) != 0x0360) {} |
lvagasi | 0:3ad0af8abf43 | 194 | return Keytable[retval]; |
lvagasi | 0:3ad0af8abf43 | 195 | } |