Simon Ford
USBMouse Example
USBMouse/usbdc.cpp@1:eb68149218fd, 2010-04-07 (annotated)
- Committer:
- simon
- Date:
- Wed Apr 07 13:42:47 2010 +0000
- Revision:
- 1:eb68149218fd
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| simon | 1:eb68149218fd | 1 | /* usbdc.cpp */ |
| simon | 1:eb68149218fd | 2 | /* USB device controller */ |
| simon | 1:eb68149218fd | 3 | /* Copyright (c) Phil Wright 2008 */ |
| simon | 1:eb68149218fd | 4 | |
| simon | 1:eb68149218fd | 5 | #include "mbed.h" |
| simon | 1:eb68149218fd | 6 | #include "usbdc.h" |
| simon | 1:eb68149218fd | 7 | #include "cmsis.h" |
| simon | 1:eb68149218fd | 8 | |
| simon | 1:eb68149218fd | 9 | #ifdef TARGET_LPC2368 |
| simon | 1:eb68149218fd | 10 | #undef LPC_USB_BASE |
| simon | 1:eb68149218fd | 11 | #define LPC_USB_BASE (0xFFE0C000) /* TODO */ |
| simon | 1:eb68149218fd | 12 | #endif |
| simon | 1:eb68149218fd | 13 | |
| simon | 1:eb68149218fd | 14 | /* Power Control for Peripherals register */ |
| simon | 1:eb68149218fd | 15 | #define PCUSB ((unsigned long)1<<31) |
| simon | 1:eb68149218fd | 16 | |
| simon | 1:eb68149218fd | 17 | /* USB Clock Control register */ |
| simon | 1:eb68149218fd | 18 | #define DEV_CLK_EN ((unsigned long)1<<1) |
| simon | 1:eb68149218fd | 19 | #define AHB_CLK_EN ((unsigned long)1<<4) |
| simon | 1:eb68149218fd | 20 | |
| simon | 1:eb68149218fd | 21 | /* USB Clock Status register */ |
| simon | 1:eb68149218fd | 22 | #define DEV_CLK_ON ((unsigned long)1<<1) |
| simon | 1:eb68149218fd | 23 | #define AHB_CLK_ON ((unsigned long)1<<4) |
| simon | 1:eb68149218fd | 24 | |
| simon | 1:eb68149218fd | 25 | /* USB Device Interupt registers */ |
| simon | 1:eb68149218fd | 26 | #define FRAME ((unsigned long)1<<0) |
| simon | 1:eb68149218fd | 27 | #define EP_FAST ((unsigned long)1<<1) |
| simon | 1:eb68149218fd | 28 | #define EP_SLOW ((unsigned long)1<<2) |
| simon | 1:eb68149218fd | 29 | #define DEV_STAT ((unsigned long)1<<3) |
| simon | 1:eb68149218fd | 30 | #define CCEMPTY ((unsigned long)1<<4) |
| simon | 1:eb68149218fd | 31 | #define CDFULL ((unsigned long)1<<5) |
| simon | 1:eb68149218fd | 32 | #define RxENDPKT ((unsigned long)1<<6) |
| simon | 1:eb68149218fd | 33 | #define TxENDPKT ((unsigned long)1<<7) |
| simon | 1:eb68149218fd | 34 | #define EP_RLZED ((unsigned long)1<<8) |
| simon | 1:eb68149218fd | 35 | #define ERR_INT ((unsigned long)1<<9) |
| simon | 1:eb68149218fd | 36 | |
| simon | 1:eb68149218fd | 37 | /* Endpoint Interrupt Registers */ |
| simon | 1:eb68149218fd | 38 | #define EP(endpoint) (1<<endpoint) |
| simon | 1:eb68149218fd | 39 | |
| simon | 1:eb68149218fd | 40 | /* USB Control register */ |
| simon | 1:eb68149218fd | 41 | #define RD_EN (1<<0) |
| simon | 1:eb68149218fd | 42 | #define WR_EN (1<<1) |
| simon | 1:eb68149218fd | 43 | #define LOG_ENDPOINT(endpoint) ((endpoint>>1)<<2) |
| simon | 1:eb68149218fd | 44 | |
| simon | 1:eb68149218fd | 45 | /* USB Receive Packet Length register */ |
| simon | 1:eb68149218fd | 46 | #define DV ((unsigned long)1<<10) |
| simon | 1:eb68149218fd | 47 | #define PKT_RDY ((unsigned long)1<<11) |
| simon | 1:eb68149218fd | 48 | #define PKT_LNGTH_MASK (0x3ff) |
| simon | 1:eb68149218fd | 49 | |
| simon | 1:eb68149218fd | 50 | /* Serial Interface Engine (SIE) */ |
| simon | 1:eb68149218fd | 51 | #define SIE_WRITE (0x01) |
| simon | 1:eb68149218fd | 52 | #define SIE_READ (0x02) |
| simon | 1:eb68149218fd | 53 | #define SIE_COMMAND (0x05) |
| simon | 1:eb68149218fd | 54 | #define SIE_CMD_CODE(phase, data) ((phase<<8)|(data<<16)) |
| simon | 1:eb68149218fd | 55 | |
| simon | 1:eb68149218fd | 56 | /* SIE Command codes */ |
| simon | 1:eb68149218fd | 57 | #define SIE_CMD_SET_ADDRESS (0xD0) |
| simon | 1:eb68149218fd | 58 | #define SIE_CMD_CONFIGURE_DEVICE (0xD8) |
| simon | 1:eb68149218fd | 59 | #define SIE_CMD_SET_MODE (0xF3) |
| simon | 1:eb68149218fd | 60 | #define SIE_CMD_READ_FRAME_NUMBER (0xF5) |
| simon | 1:eb68149218fd | 61 | #define SIE_CMD_READ_TEST_REGISTER (0xFD) |
| simon | 1:eb68149218fd | 62 | #define SIE_CMD_SET_DEVICE_STATUS (0xFE) |
| simon | 1:eb68149218fd | 63 | #define SIE_CMD_GET_DEVICE_STATUS (0xFE) |
| simon | 1:eb68149218fd | 64 | #define SIE_CMD_GET_ERROR_CODE (0xFF) |
| simon | 1:eb68149218fd | 65 | #define SIE_CMD_READ_ERROR_STATUS (0xFB) |
| simon | 1:eb68149218fd | 66 | |
| simon | 1:eb68149218fd | 67 | #define SIE_CMD_SELECT_ENDPOINT(endpoint) (0x00+endpoint) |
| simon | 1:eb68149218fd | 68 | #define SIE_CMD_SELECT_ENDPOINT_CLEAR_INTERRUPT(endpoint) (0x40+endpoint) |
| simon | 1:eb68149218fd | 69 | #define SIE_CMD_SET_ENDPOINT_STATUS(endpoint) (0x40+endpoint) |
| simon | 1:eb68149218fd | 70 | |
| simon | 1:eb68149218fd | 71 | #define SIE_CMD_CLEAR_BUFFER (0xF2) |
| simon | 1:eb68149218fd | 72 | #define SIE_CMD_VALIDATE_BUFFER (0xFA) |
| simon | 1:eb68149218fd | 73 | |
| simon | 1:eb68149218fd | 74 | /* SIE Device Status register */ |
| simon | 1:eb68149218fd | 75 | #define SIE_DS_CON (1<<0) |
| simon | 1:eb68149218fd | 76 | #define SIE_DS_CON_CH (1<<1) |
| simon | 1:eb68149218fd | 77 | #define SIE_DS_SUS (1<<2) |
| simon | 1:eb68149218fd | 78 | #define SIE_DS_SUS_CH (1<<3) |
| simon | 1:eb68149218fd | 79 | #define SIE_DS_RST (1<<4) |
| simon | 1:eb68149218fd | 80 | |
| simon | 1:eb68149218fd | 81 | /* SIE Device Set Address register */ |
| simon | 1:eb68149218fd | 82 | #define SIE_DSA_DEV_EN (1<<7) |
| simon | 1:eb68149218fd | 83 | |
| simon | 1:eb68149218fd | 84 | /* SIE Configue Device register */ |
| simon | 1:eb68149218fd | 85 | #define SIE_CONF_DEVICE (1<<0) |
| simon | 1:eb68149218fd | 86 | |
| simon | 1:eb68149218fd | 87 | /* Select Endpoint register */ |
| simon | 1:eb68149218fd | 88 | #define SIE_SE_FE (1<<0) |
| simon | 1:eb68149218fd | 89 | #define SIE_SE_ST (1<<1) |
| simon | 1:eb68149218fd | 90 | #define SIE_SE_STP (1<<2) |
| simon | 1:eb68149218fd | 91 | #define SIE_SE_PO (1<<3) |
| simon | 1:eb68149218fd | 92 | #define SIE_SE_EPN (1<<4) |
| simon | 1:eb68149218fd | 93 | #define SIE_SE_B_1_FULL (1<<5) |
| simon | 1:eb68149218fd | 94 | #define SIE_SE_B_2_FULL (1<<6) |
| simon | 1:eb68149218fd | 95 | |
| simon | 1:eb68149218fd | 96 | /* Set Endpoint Status command */ |
| simon | 1:eb68149218fd | 97 | #define SIE_SES_ST (1<<0) |
| simon | 1:eb68149218fd | 98 | #define SIE_SES_DA (1<<5) |
| simon | 1:eb68149218fd | 99 | #define SIE_SES_RF_MO (1<<6) |
| simon | 1:eb68149218fd | 100 | #define SIE_SES_CND_ST (1<<7) |
| simon | 1:eb68149218fd | 101 | |
| simon | 1:eb68149218fd | 102 | usbdc *usbdc::instance; |
| simon | 1:eb68149218fd | 103 | |
| simon | 1:eb68149218fd | 104 | usbdc::usbdc() |
| simon | 1:eb68149218fd | 105 | { |
| simon | 1:eb68149218fd | 106 | #ifdef TARGET_LPC1768 |
| simon | 1:eb68149218fd | 107 | LPC_SC->USBCLKCFG=5; /* TODO */ |
| simon | 1:eb68149218fd | 108 | #endif |
| simon | 1:eb68149218fd | 109 | |
| simon | 1:eb68149218fd | 110 | /* Enable power to USB device controller */ |
| simon | 1:eb68149218fd | 111 | LPC_SC->PCONP |= PCUSB; |
| simon | 1:eb68149218fd | 112 | |
| simon | 1:eb68149218fd | 113 | /* Enable USB clocks */ |
| simon | 1:eb68149218fd | 114 | LPC_USB->USBClkCtrl |= DEV_CLK_EN | AHB_CLK_EN; |
| simon | 1:eb68149218fd | 115 | while (LPC_USB->USBClkSt != (DEV_CLK_ON | AHB_CLK_ON)); |
| simon | 1:eb68149218fd | 116 | |
| simon | 1:eb68149218fd | 117 | /* Configure pins P0.29 and P0.30 to be USB D+ and USB D- */ |
| simon | 1:eb68149218fd | 118 | LPC_PINCON->PINSEL1 &= 0xc3ffffff; |
| simon | 1:eb68149218fd | 119 | LPC_PINCON->PINSEL1 |= 0x14000000; |
| simon | 1:eb68149218fd | 120 | |
| simon | 1:eb68149218fd | 121 | #ifdef ENABLE_VBUS |
| simon | 1:eb68149218fd | 122 | /* Configure pin P1.30 to be VBUS */ |
| simon | 1:eb68149218fd | 123 | LPC_PINCON->PINSEL3 &= 0xcfffffff; |
| simon | 1:eb68149218fd | 124 | LPC_PINCON->PINSEL3 |= 0x20000000; |
| simon | 1:eb68149218fd | 125 | |
| simon | 1:eb68149218fd | 126 | /* Configure pin P1.30 to have pull-down */ |
| simon | 1:eb68149218fd | 127 | LPC_PINCON->PINMODE3 |= 0x30000000; |
| simon | 1:eb68149218fd | 128 | #endif |
| simon | 1:eb68149218fd | 129 | |
| simon | 1:eb68149218fd | 130 | /* Configure pin P2.9 to be Connect */ |
| simon | 1:eb68149218fd | 131 | LPC_PINCON->PINSEL4 &= 0xfffcffff; |
| simon | 1:eb68149218fd | 132 | LPC_PINCON->PINSEL4 |= 0x00040000; |
| simon | 1:eb68149218fd | 133 | |
| simon | 1:eb68149218fd | 134 | /* Connect must be low for at least 2.5uS */ |
| simon | 1:eb68149218fd | 135 | wait_ms(1); |
| simon | 1:eb68149218fd | 136 | |
| simon | 1:eb68149218fd | 137 | /* Attach IRQ */ |
| simon | 1:eb68149218fd | 138 | instance = this; |
| simon | 1:eb68149218fd | 139 | NVIC_SetVector(USB_IRQn, (uint32_t)&_usbisr); |
| simon | 1:eb68149218fd | 140 | NVIC_EnableIRQ(USB_IRQn); |
| simon | 1:eb68149218fd | 141 | |
| simon | 1:eb68149218fd | 142 | /* Enable device interrupts */ |
| simon | 1:eb68149218fd | 143 | enableEvents(); |
| simon | 1:eb68149218fd | 144 | } |
| simon | 1:eb68149218fd | 145 | |
| simon | 1:eb68149218fd | 146 | void usbdc::connect(void) |
| simon | 1:eb68149218fd | 147 | { |
| simon | 1:eb68149218fd | 148 | /* Connect USB device */ |
| simon | 1:eb68149218fd | 149 | unsigned char status; |
| simon | 1:eb68149218fd | 150 | |
| simon | 1:eb68149218fd | 151 | status = getDeviceStatus(); |
| simon | 1:eb68149218fd | 152 | setDeviceStatus(status | SIE_DS_CON); |
| simon | 1:eb68149218fd | 153 | } |
| simon | 1:eb68149218fd | 154 | |
| simon | 1:eb68149218fd | 155 | void usbdc::disconnect(void) |
| simon | 1:eb68149218fd | 156 | { |
| simon | 1:eb68149218fd | 157 | /* Disconnect USB device */ |
| simon | 1:eb68149218fd | 158 | unsigned char status; |
| simon | 1:eb68149218fd | 159 | |
| simon | 1:eb68149218fd | 160 | status = getDeviceStatus(); |
| simon | 1:eb68149218fd | 161 | setDeviceStatus(status & ~SIE_DS_CON); |
| simon | 1:eb68149218fd | 162 | } |
| simon | 1:eb68149218fd | 163 | |
| simon | 1:eb68149218fd | 164 | void usbdc::SIECommand(unsigned long command) |
| simon | 1:eb68149218fd | 165 | { |
| simon | 1:eb68149218fd | 166 | /* The command phase of a SIE transaction */ |
| simon | 1:eb68149218fd | 167 | LPC_USB->USBDevIntClr = CCEMPTY; |
| simon | 1:eb68149218fd | 168 | LPC_USB->USBCmdCode = SIE_CMD_CODE(SIE_COMMAND, command); |
| simon | 1:eb68149218fd | 169 | while (!(LPC_USB->USBDevIntSt & CCEMPTY)); |
| simon | 1:eb68149218fd | 170 | } |
| simon | 1:eb68149218fd | 171 | |
| simon | 1:eb68149218fd | 172 | void usbdc::SIEWriteData(unsigned char data) |
| simon | 1:eb68149218fd | 173 | { |
| simon | 1:eb68149218fd | 174 | /* The data write phase of a SIE transaction */ |
| simon | 1:eb68149218fd | 175 | LPC_USB->USBDevIntClr = CCEMPTY; |
| simon | 1:eb68149218fd | 176 | LPC_USB->USBCmdCode = SIE_CMD_CODE(SIE_WRITE, data); |
| simon | 1:eb68149218fd | 177 | while (!(LPC_USB->USBDevIntSt & CCEMPTY)); |
| simon | 1:eb68149218fd | 178 | } |
| simon | 1:eb68149218fd | 179 | |
| simon | 1:eb68149218fd | 180 | unsigned char usbdc::SIEReadData(unsigned long command) |
| simon | 1:eb68149218fd | 181 | { |
| simon | 1:eb68149218fd | 182 | /* The data read phase of a SIE transaction */ |
| simon | 1:eb68149218fd | 183 | LPC_USB->USBDevIntClr = CDFULL; |
| simon | 1:eb68149218fd | 184 | LPC_USB->USBCmdCode = SIE_CMD_CODE(SIE_READ, command); |
| simon | 1:eb68149218fd | 185 | while (!(LPC_USB->USBDevIntSt & CDFULL)); |
| simon | 1:eb68149218fd | 186 | return (unsigned char)LPC_USB->USBCmdData; |
| simon | 1:eb68149218fd | 187 | } |
| simon | 1:eb68149218fd | 188 | |
| simon | 1:eb68149218fd | 189 | void usbdc::setDeviceStatus(unsigned char status) |
| simon | 1:eb68149218fd | 190 | { |
| simon | 1:eb68149218fd | 191 | /* Write SIE device status register */ |
| simon | 1:eb68149218fd | 192 | SIECommand(SIE_CMD_SET_DEVICE_STATUS); |
| simon | 1:eb68149218fd | 193 | SIEWriteData(status); |
| simon | 1:eb68149218fd | 194 | } |
| simon | 1:eb68149218fd | 195 | |
| simon | 1:eb68149218fd | 196 | unsigned char usbdc::getDeviceStatus(void) |
| simon | 1:eb68149218fd | 197 | { |
| simon | 1:eb68149218fd | 198 | /* Read SIE device status register */ |
| simon | 1:eb68149218fd | 199 | SIECommand(SIE_CMD_GET_DEVICE_STATUS); |
| simon | 1:eb68149218fd | 200 | return SIEReadData(SIE_CMD_GET_DEVICE_STATUS); |
| simon | 1:eb68149218fd | 201 | } |
| simon | 1:eb68149218fd | 202 | |
| simon | 1:eb68149218fd | 203 | void usbdc::setAddress(unsigned char address) |
| simon | 1:eb68149218fd | 204 | { |
| simon | 1:eb68149218fd | 205 | /* Write SIE device address register */ |
| simon | 1:eb68149218fd | 206 | SIECommand(SIE_CMD_SET_ADDRESS); |
| simon | 1:eb68149218fd | 207 | SIEWriteData((address & 0x7f) | SIE_DSA_DEV_EN); |
| simon | 1:eb68149218fd | 208 | } |
| simon | 1:eb68149218fd | 209 | |
| simon | 1:eb68149218fd | 210 | unsigned char usbdc::selectEndpoint(unsigned char endpoint) |
| simon | 1:eb68149218fd | 211 | { |
| simon | 1:eb68149218fd | 212 | /* SIE select endpoint command */ |
| simon | 1:eb68149218fd | 213 | SIECommand(SIE_CMD_SELECT_ENDPOINT(endpoint)); |
| simon | 1:eb68149218fd | 214 | return SIEReadData(SIE_CMD_SELECT_ENDPOINT(endpoint)); |
| simon | 1:eb68149218fd | 215 | } |
| simon | 1:eb68149218fd | 216 | |
| simon | 1:eb68149218fd | 217 | #if 1 |
| simon | 1:eb68149218fd | 218 | unsigned char usbdc::selectEndpointClearInterrupt(unsigned char endpoint) |
| simon | 1:eb68149218fd | 219 | { |
| simon | 1:eb68149218fd | 220 | /* SIE select endpoint and clear interrupt command */ |
| simon | 1:eb68149218fd | 221 | /* Using the Select Endpoint / Clear Interrupt SIE command does not seem */ |
| simon | 1:eb68149218fd | 222 | /* to clear the appropriate bit in EP_INT_STAT? - using EP_INT_CLR instead */ |
| simon | 1:eb68149218fd | 223 | LPC_USB->USBEpIntClr = EP(endpoint); |
| simon | 1:eb68149218fd | 224 | while (!(LPC_USB->USBDevIntSt & CDFULL)); |
| simon | 1:eb68149218fd | 225 | return (unsigned char)LPC_USB->USBCmdData; |
| simon | 1:eb68149218fd | 226 | } |
| simon | 1:eb68149218fd | 227 | #else |
| simon | 1:eb68149218fd | 228 | unsigned char usbdc::selectEndpointClearInterrupt(unsigned char endpoint) |
| simon | 1:eb68149218fd | 229 | { |
| simon | 1:eb68149218fd | 230 | /* SIE select endpoint and clear interrupt command */ |
| simon | 1:eb68149218fd | 231 | SIECommand(SIE_CMD_SELECT_ENDPOINT_CLEAR_INTERRUPT(endpoint)); |
| simon | 1:eb68149218fd | 232 | return SIEReadData(SIE_CMD_SELECT_ENDPOINT_CLEAR_INTERRUPT(endpoint)); |
| simon | 1:eb68149218fd | 233 | } |
| simon | 1:eb68149218fd | 234 | #endif |
| simon | 1:eb68149218fd | 235 | |
| simon | 1:eb68149218fd | 236 | unsigned char usbdc::clearBuffer(void) |
| simon | 1:eb68149218fd | 237 | { |
| simon | 1:eb68149218fd | 238 | /* SIE clear buffer command */ |
| simon | 1:eb68149218fd | 239 | SIECommand(SIE_CMD_CLEAR_BUFFER); |
| simon | 1:eb68149218fd | 240 | return SIEReadData(SIE_CMD_CLEAR_BUFFER); |
| simon | 1:eb68149218fd | 241 | } |
| simon | 1:eb68149218fd | 242 | |
| simon | 1:eb68149218fd | 243 | void usbdc::validateBuffer(void) |
| simon | 1:eb68149218fd | 244 | { |
| simon | 1:eb68149218fd | 245 | /* SIE validate buffer command */ |
| simon | 1:eb68149218fd | 246 | SIECommand(SIE_CMD_VALIDATE_BUFFER); |
| simon | 1:eb68149218fd | 247 | } |
| simon | 1:eb68149218fd | 248 | |
| simon | 1:eb68149218fd | 249 | void usbdc::setEndpointStatus(unsigned char endpoint, unsigned char status) |
| simon | 1:eb68149218fd | 250 | { |
| simon | 1:eb68149218fd | 251 | /* SIE set endpoint status command */ |
| simon | 1:eb68149218fd | 252 | SIECommand(SIE_CMD_SET_ENDPOINT_STATUS(endpoint)); |
| simon | 1:eb68149218fd | 253 | SIEWriteData(status); |
| simon | 1:eb68149218fd | 254 | } |
| simon | 1:eb68149218fd | 255 | |
| simon | 1:eb68149218fd | 256 | void usbdc::realiseEndpoint(unsigned char endpoint, unsigned long maxPacket) |
| simon | 1:eb68149218fd | 257 | { |
| simon | 1:eb68149218fd | 258 | /* Realise an endpoint */ |
| simon | 1:eb68149218fd | 259 | LPC_USB->USBDevIntClr = EP_RLZED; |
| simon | 1:eb68149218fd | 260 | LPC_USB->USBReEp |= EP(endpoint); |
| simon | 1:eb68149218fd | 261 | LPC_USB->USBEpInd = endpoint; |
| simon | 1:eb68149218fd | 262 | LPC_USB->USBMaxPSize = maxPacket; |
| simon | 1:eb68149218fd | 263 | |
| simon | 1:eb68149218fd | 264 | while (!(LPC_USB->USBDevIntSt & EP_RLZED)); |
| simon | 1:eb68149218fd | 265 | LPC_USB->USBDevIntClr = EP_RLZED; |
| simon | 1:eb68149218fd | 266 | |
| simon | 1:eb68149218fd | 267 | /* Clear stall state */ |
| simon | 1:eb68149218fd | 268 | endpointStallState &= ~EP(endpoint); |
| simon | 1:eb68149218fd | 269 | } |
| simon | 1:eb68149218fd | 270 | |
| simon | 1:eb68149218fd | 271 | void usbdc::enableEndpointEvent(unsigned char endpoint) |
| simon | 1:eb68149218fd | 272 | { |
| simon | 1:eb68149218fd | 273 | /* Enable an endpoint interrupt */ |
| simon | 1:eb68149218fd | 274 | LPC_USB->USBEpIntEn |= EP(endpoint); |
| simon | 1:eb68149218fd | 275 | } |
| simon | 1:eb68149218fd | 276 | |
| simon | 1:eb68149218fd | 277 | void usbdc::disableEndpointEvent(unsigned char endpoint) |
| simon | 1:eb68149218fd | 278 | { |
| simon | 1:eb68149218fd | 279 | /* Disable an endpoint interrupt */ |
| simon | 1:eb68149218fd | 280 | LPC_USB->USBEpIntEn &= ~EP(endpoint); |
| simon | 1:eb68149218fd | 281 | } |
| simon | 1:eb68149218fd | 282 | |
| simon | 1:eb68149218fd | 283 | void usbdc::stallEndpoint(unsigned char endpoint) |
| simon | 1:eb68149218fd | 284 | { |
| simon | 1:eb68149218fd | 285 | /* Stall an endpoint */ |
| simon | 1:eb68149218fd | 286 | if ( (endpoint==EP0IN) || (endpoint==EP0OUT) ) |
| simon | 1:eb68149218fd | 287 | { |
| simon | 1:eb68149218fd | 288 | /* Conditionally stall both control endpoints */ |
| simon | 1:eb68149218fd | 289 | setEndpointStatus(EP0OUT, SIE_SES_CND_ST); |
| simon | 1:eb68149218fd | 290 | } |
| simon | 1:eb68149218fd | 291 | else |
| simon | 1:eb68149218fd | 292 | { |
| simon | 1:eb68149218fd | 293 | setEndpointStatus(endpoint, SIE_SES_ST); |
| simon | 1:eb68149218fd | 294 | |
| simon | 1:eb68149218fd | 295 | /* Update stall state */ |
| simon | 1:eb68149218fd | 296 | endpointStallState |= EP(endpoint); |
| simon | 1:eb68149218fd | 297 | } |
| simon | 1:eb68149218fd | 298 | } |
| simon | 1:eb68149218fd | 299 | |
| simon | 1:eb68149218fd | 300 | void usbdc::unstallEndpoint(unsigned char endpoint) |
| simon | 1:eb68149218fd | 301 | { |
| simon | 1:eb68149218fd | 302 | /* Unstall an endpoint. The endpoint will also be reinitialised */ |
| simon | 1:eb68149218fd | 303 | setEndpointStatus(endpoint, 0); |
| simon | 1:eb68149218fd | 304 | |
| simon | 1:eb68149218fd | 305 | /* Update stall state */ |
| simon | 1:eb68149218fd | 306 | endpointStallState &= ~EP(endpoint); |
| simon | 1:eb68149218fd | 307 | } |
| simon | 1:eb68149218fd | 308 | |
| simon | 1:eb68149218fd | 309 | bool usbdc::getEndpointStallState(unsigned char endpoint) |
| simon | 1:eb68149218fd | 310 | { |
| simon | 1:eb68149218fd | 311 | /* Returns true if endpoint stalled */ |
| simon | 1:eb68149218fd | 312 | return endpointStallState & EP(endpoint); |
| simon | 1:eb68149218fd | 313 | } |
| simon | 1:eb68149218fd | 314 | |
| simon | 1:eb68149218fd | 315 | void usbdc::configureDevice(void) |
| simon | 1:eb68149218fd | 316 | { |
| simon | 1:eb68149218fd | 317 | /* SIE Configure device command */ |
| simon | 1:eb68149218fd | 318 | SIECommand(SIE_CMD_CONFIGURE_DEVICE); |
| simon | 1:eb68149218fd | 319 | SIEWriteData(SIE_CONF_DEVICE); |
| simon | 1:eb68149218fd | 320 | } |
| simon | 1:eb68149218fd | 321 | |
| simon | 1:eb68149218fd | 322 | void usbdc::unconfigureDevice(void) |
| simon | 1:eb68149218fd | 323 | { |
| simon | 1:eb68149218fd | 324 | /* SIE Configure device command */ |
| simon | 1:eb68149218fd | 325 | SIECommand(SIE_CMD_CONFIGURE_DEVICE); |
| simon | 1:eb68149218fd | 326 | SIEWriteData(0); |
| simon | 1:eb68149218fd | 327 | } |
| simon | 1:eb68149218fd | 328 | |
| simon | 1:eb68149218fd | 329 | unsigned long usbdc::endpointRead(unsigned char endpoint, unsigned char *buffer) |
| simon | 1:eb68149218fd | 330 | { |
| simon | 1:eb68149218fd | 331 | /* Read from an OUT endpoint */ |
| simon | 1:eb68149218fd | 332 | unsigned long size; |
| simon | 1:eb68149218fd | 333 | unsigned long i; |
| simon | 1:eb68149218fd | 334 | unsigned long data; |
| simon | 1:eb68149218fd | 335 | unsigned char offset; |
| simon | 1:eb68149218fd | 336 | |
| simon | 1:eb68149218fd | 337 | LPC_USB->USBCtrl = LOG_ENDPOINT(endpoint) | RD_EN; |
| simon | 1:eb68149218fd | 338 | while (!(LPC_USB->USBRxPLen & PKT_RDY)); |
| simon | 1:eb68149218fd | 339 | |
| simon | 1:eb68149218fd | 340 | size = LPC_USB->USBRxPLen & PKT_LNGTH_MASK; |
| simon | 1:eb68149218fd | 341 | |
| simon | 1:eb68149218fd | 342 | offset = 0; |
| simon | 1:eb68149218fd | 343 | |
| simon | 1:eb68149218fd | 344 | for (i=0; i<size; i++) |
| simon | 1:eb68149218fd | 345 | { |
| simon | 1:eb68149218fd | 346 | if (offset==0) |
| simon | 1:eb68149218fd | 347 | { |
| simon | 1:eb68149218fd | 348 | /* Fetch up to four bytes of data as a word */ |
| simon | 1:eb68149218fd | 349 | data = LPC_USB->USBRxData; |
| simon | 1:eb68149218fd | 350 | } |
| simon | 1:eb68149218fd | 351 | |
| simon | 1:eb68149218fd | 352 | /* extract a byte */ |
| simon | 1:eb68149218fd | 353 | *buffer++ = data>>offset; |
| simon | 1:eb68149218fd | 354 | |
| simon | 1:eb68149218fd | 355 | /* move on to the next byte */ |
| simon | 1:eb68149218fd | 356 | offset = (offset + 8) % 32; |
| simon | 1:eb68149218fd | 357 | } |
| simon | 1:eb68149218fd | 358 | |
| simon | 1:eb68149218fd | 359 | /* Clear RD_EN to cover zero length packet case */ |
| simon | 1:eb68149218fd | 360 | LPC_USB->USBCtrl=0; |
| simon | 1:eb68149218fd | 361 | |
| simon | 1:eb68149218fd | 362 | selectEndpoint(endpoint); |
| simon | 1:eb68149218fd | 363 | clearBuffer(); |
| simon | 1:eb68149218fd | 364 | |
| simon | 1:eb68149218fd | 365 | return size; |
| simon | 1:eb68149218fd | 366 | } |
| simon | 1:eb68149218fd | 367 | |
| simon | 1:eb68149218fd | 368 | void usbdc::endpointWrite(unsigned char endpoint, unsigned char *buffer, unsigned long size) |
| simon | 1:eb68149218fd | 369 | { |
| simon | 1:eb68149218fd | 370 | /* Write to an IN endpoint */ |
| simon | 1:eb68149218fd | 371 | unsigned long temp, data; |
| simon | 1:eb68149218fd | 372 | unsigned char offset; |
| simon | 1:eb68149218fd | 373 | |
| simon | 1:eb68149218fd | 374 | LPC_USB->USBCtrl = LOG_ENDPOINT(endpoint) | WR_EN; |
| simon | 1:eb68149218fd | 375 | |
| simon | 1:eb68149218fd | 376 | LPC_USB->USBTxPLen = size; |
| simon | 1:eb68149218fd | 377 | offset = 0; |
| simon | 1:eb68149218fd | 378 | data = 0; |
| simon | 1:eb68149218fd | 379 | |
| simon | 1:eb68149218fd | 380 | if (size>0) |
| simon | 1:eb68149218fd | 381 | { |
| simon | 1:eb68149218fd | 382 | do { |
| simon | 1:eb68149218fd | 383 | /* Fetch next data byte into a word-sized temporary variable */ |
| simon | 1:eb68149218fd | 384 | temp = *buffer++; |
| simon | 1:eb68149218fd | 385 | |
| simon | 1:eb68149218fd | 386 | /* Add to current data word */ |
| simon | 1:eb68149218fd | 387 | temp = temp << offset; |
| simon | 1:eb68149218fd | 388 | data = data | temp; |
| simon | 1:eb68149218fd | 389 | |
| simon | 1:eb68149218fd | 390 | /* move on to the next byte */ |
| simon | 1:eb68149218fd | 391 | offset = (offset + 8) % 32; |
| simon | 1:eb68149218fd | 392 | size--; |
| simon | 1:eb68149218fd | 393 | |
| simon | 1:eb68149218fd | 394 | if ((offset==0) || (size==0)) |
| simon | 1:eb68149218fd | 395 | { |
| simon | 1:eb68149218fd | 396 | /* Write the word to the endpoint */ |
| simon | 1:eb68149218fd | 397 | LPC_USB->USBTxData = data; |
| simon | 1:eb68149218fd | 398 | data = 0; |
| simon | 1:eb68149218fd | 399 | } |
| simon | 1:eb68149218fd | 400 | } while (size>0); |
| simon | 1:eb68149218fd | 401 | } |
| simon | 1:eb68149218fd | 402 | |
| simon | 1:eb68149218fd | 403 | /* Clear WR_EN to cover zero length packet case */ |
| simon | 1:eb68149218fd | 404 | LPC_USB->USBCtrl=0; |
| simon | 1:eb68149218fd | 405 | |
| simon | 1:eb68149218fd | 406 | selectEndpoint(endpoint); |
| simon | 1:eb68149218fd | 407 | validateBuffer(); |
| simon | 1:eb68149218fd | 408 | } |
| simon | 1:eb68149218fd | 409 | |
| simon | 1:eb68149218fd | 410 | void usbdc::enableEvents(void) |
| simon | 1:eb68149218fd | 411 | { |
| simon | 1:eb68149218fd | 412 | /* Enable interrupt sources */ |
| simon | 1:eb68149218fd | 413 | LPC_USB->USBDevIntEn = EP_SLOW | DEV_STAT; |
| simon | 1:eb68149218fd | 414 | } |
| simon | 1:eb68149218fd | 415 | |
| simon | 1:eb68149218fd | 416 | void usbdc::disableEvents(void) |
| simon | 1:eb68149218fd | 417 | { |
| simon | 1:eb68149218fd | 418 | /* Disable interrupt sources */ |
| simon | 1:eb68149218fd | 419 | LPC_USB->USBDevIntClr = EP_SLOW | DEV_STAT; |
| simon | 1:eb68149218fd | 420 | } |
| simon | 1:eb68149218fd | 421 | |
| simon | 1:eb68149218fd | 422 | void usbdc::usbisr(void) |
| simon | 1:eb68149218fd | 423 | { |
| simon | 1:eb68149218fd | 424 | unsigned char devStat; |
| simon | 1:eb68149218fd | 425 | |
| simon | 1:eb68149218fd | 426 | if (LPC_USB->USBDevIntSt & FRAME) |
| simon | 1:eb68149218fd | 427 | { |
| simon | 1:eb68149218fd | 428 | /* Frame event */ |
| simon | 1:eb68149218fd | 429 | deviceEventFrame(); |
| simon | 1:eb68149218fd | 430 | /* Clear interrupt status flag */ |
| simon | 1:eb68149218fd | 431 | LPC_USB->USBDevIntClr = FRAME; |
| simon | 1:eb68149218fd | 432 | } |
| simon | 1:eb68149218fd | 433 | |
| simon | 1:eb68149218fd | 434 | if (LPC_USB->USBDevIntSt & DEV_STAT) |
| simon | 1:eb68149218fd | 435 | { |
| simon | 1:eb68149218fd | 436 | /* Device Status interrupt */ |
| simon | 1:eb68149218fd | 437 | /* Must clear the interrupt status flag before reading the device status from the SIE */ |
| simon | 1:eb68149218fd | 438 | LPC_USB->USBDevIntClr = DEV_STAT; |
| simon | 1:eb68149218fd | 439 | |
| simon | 1:eb68149218fd | 440 | /* Read device status from SIE */ |
| simon | 1:eb68149218fd | 441 | devStat = getDeviceStatus(); |
| simon | 1:eb68149218fd | 442 | |
| simon | 1:eb68149218fd | 443 | if (devStat & SIE_DS_RST) |
| simon | 1:eb68149218fd | 444 | { |
| simon | 1:eb68149218fd | 445 | /* Bus reset */ |
| simon | 1:eb68149218fd | 446 | deviceEventReset(); |
| simon | 1:eb68149218fd | 447 | } |
| simon | 1:eb68149218fd | 448 | } |
| simon | 1:eb68149218fd | 449 | |
| simon | 1:eb68149218fd | 450 | if (LPC_USB->USBDevIntSt & EP_SLOW) |
| simon | 1:eb68149218fd | 451 | { |
| simon | 1:eb68149218fd | 452 | /* (Slow) Endpoint Interrupt */ |
| simon | 1:eb68149218fd | 453 | |
| simon | 1:eb68149218fd | 454 | /* Process each endpoint interrupt */ |
| simon | 1:eb68149218fd | 455 | if (LPC_USB->USBEpIntSt & EP(EP0OUT)) |
| simon | 1:eb68149218fd | 456 | { |
| simon | 1:eb68149218fd | 457 | if (selectEndpointClearInterrupt(EP0OUT) & SIE_SE_STP) |
| simon | 1:eb68149218fd | 458 | { |
| simon | 1:eb68149218fd | 459 | /* this is a setup packet */ |
| simon | 1:eb68149218fd | 460 | endpointEventEP0Setup(); |
| simon | 1:eb68149218fd | 461 | } |
| simon | 1:eb68149218fd | 462 | else |
| simon | 1:eb68149218fd | 463 | { |
| simon | 1:eb68149218fd | 464 | endpointEventEP0Out(); |
| simon | 1:eb68149218fd | 465 | } |
| simon | 1:eb68149218fd | 466 | } |
| simon | 1:eb68149218fd | 467 | |
| simon | 1:eb68149218fd | 468 | if (LPC_USB->USBEpIntSt & EP(EP0IN)) |
| simon | 1:eb68149218fd | 469 | { |
| simon | 1:eb68149218fd | 470 | selectEndpointClearInterrupt(EP0IN); |
| simon | 1:eb68149218fd | 471 | endpointEventEP0In(); |
| simon | 1:eb68149218fd | 472 | } |
| simon | 1:eb68149218fd | 473 | |
| simon | 1:eb68149218fd | 474 | if (LPC_USB->USBEpIntSt & EP(EP1OUT)) |
| simon | 1:eb68149218fd | 475 | { |
| simon | 1:eb68149218fd | 476 | selectEndpointClearInterrupt(EP1OUT); |
| simon | 1:eb68149218fd | 477 | endpointEventEP1Out(); |
| simon | 1:eb68149218fd | 478 | } |
| simon | 1:eb68149218fd | 479 | |
| simon | 1:eb68149218fd | 480 | if (LPC_USB->USBEpIntSt & EP(EP1IN)) |
| simon | 1:eb68149218fd | 481 | { |
| simon | 1:eb68149218fd | 482 | selectEndpointClearInterrupt(EP1IN); |
| simon | 1:eb68149218fd | 483 | endpointEventEP1In(); |
| simon | 1:eb68149218fd | 484 | } |
| simon | 1:eb68149218fd | 485 | |
| simon | 1:eb68149218fd | 486 | if (LPC_USB->USBEpIntSt & EP(EP2OUT)) |
| simon | 1:eb68149218fd | 487 | { |
| simon | 1:eb68149218fd | 488 | selectEndpointClearInterrupt(EP2OUT); |
| simon | 1:eb68149218fd | 489 | endpointEventEP2Out(); |
| simon | 1:eb68149218fd | 490 | } |
| simon | 1:eb68149218fd | 491 | |
| simon | 1:eb68149218fd | 492 | if (LPC_USB->USBEpIntSt & EP(EP2IN)) |
| simon | 1:eb68149218fd | 493 | { |
| simon | 1:eb68149218fd | 494 | selectEndpointClearInterrupt(EP2IN); |
| simon | 1:eb68149218fd | 495 | endpointEventEP2In(); |
| simon | 1:eb68149218fd | 496 | } |
| simon | 1:eb68149218fd | 497 | |
| simon | 1:eb68149218fd | 498 | /* Clear interrupt status flag */ |
| simon | 1:eb68149218fd | 499 | /* EP_SLOW and EP_FAST interrupt bits should be cleared after the corresponding endpoint interrupts are cleared. */ |
| simon | 1:eb68149218fd | 500 | LPC_USB->USBDevIntClr = EP_SLOW; |
| simon | 1:eb68149218fd | 501 | } |
| simon | 1:eb68149218fd | 502 | } |
| simon | 1:eb68149218fd | 503 | |
| simon | 1:eb68149218fd | 504 | |
| simon | 1:eb68149218fd | 505 | void usbdc::_usbisr(void) |
| simon | 1:eb68149218fd | 506 | { |
| simon | 1:eb68149218fd | 507 | instance->usbisr(); |
| simon | 1:eb68149218fd | 508 | } |
| simon | 1:eb68149218fd | 509 | |
| simon | 1:eb68149218fd | 510 | void usbdc::deviceEventReset(void) |
| simon | 1:eb68149218fd | 511 | { |
| simon | 1:eb68149218fd | 512 | } |
| simon | 1:eb68149218fd | 513 | |
| simon | 1:eb68149218fd | 514 | void usbdc::deviceEventFrame(void) |
| simon | 1:eb68149218fd | 515 | { |
| simon | 1:eb68149218fd | 516 | } |
| simon | 1:eb68149218fd | 517 | |
| simon | 1:eb68149218fd | 518 | void usbdc::endpointEventEP0Setup(void) |
| simon | 1:eb68149218fd | 519 | { |
| simon | 1:eb68149218fd | 520 | } |
| simon | 1:eb68149218fd | 521 | |
| simon | 1:eb68149218fd | 522 | void usbdc::endpointEventEP0In(void) |
| simon | 1:eb68149218fd | 523 | { |
| simon | 1:eb68149218fd | 524 | } |
| simon | 1:eb68149218fd | 525 | |
| simon | 1:eb68149218fd | 526 | void usbdc::endpointEventEP0Out(void) |
| simon | 1:eb68149218fd | 527 | { |
| simon | 1:eb68149218fd | 528 | } |
| simon | 1:eb68149218fd | 529 | |
| simon | 1:eb68149218fd | 530 | void usbdc::endpointEventEP1In(void) |
| simon | 1:eb68149218fd | 531 | { |
| simon | 1:eb68149218fd | 532 | } |
| simon | 1:eb68149218fd | 533 | |
| simon | 1:eb68149218fd | 534 | void usbdc::endpointEventEP1Out(void) |
| simon | 1:eb68149218fd | 535 | { |
| simon | 1:eb68149218fd | 536 | } |
| simon | 1:eb68149218fd | 537 | |
| simon | 1:eb68149218fd | 538 | void usbdc::endpointEventEP2In(void) |
| simon | 1:eb68149218fd | 539 | { |
| simon | 1:eb68149218fd | 540 | } |
| simon | 1:eb68149218fd | 541 | |
| simon | 1:eb68149218fd | 542 | void usbdc::endpointEventEP2Out(void) |
| simon | 1:eb68149218fd | 543 | { |
| simon | 1:eb68149218fd | 544 | } |