USB Mouse (relative) example for mbed NXP LPC11U24 beta
USB_HID_STACK/USBBusInterface_LPC17_LPC23.c@1:e089be2a6aa1, 2011-11-09 (annotated)
- Committer:
- chris
- Date:
- Wed Nov 09 15:55:10 2011 +0000
- Revision:
- 1:e089be2a6aa1
- Parent:
- 0:163560051396
removed include for <math.h> that is already included by mbed.h
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
chris | 0:163560051396 | 1 | /* USBBusInterface_LPC17_LPC23.c */ |
chris | 0:163560051396 | 2 | /* USB Bus Interface for NXP LPC1768 and LPC2368 */ |
chris | 0:163560051396 | 3 | /* Copyright (c) 2011 ARM Limited. All rights reserved. */ |
chris | 0:163560051396 | 4 | |
chris | 0:163560051396 | 5 | #ifdef TARGET_LPC1768 |
chris | 0:163560051396 | 6 | |
chris | 0:163560051396 | 7 | #include "USBBusInterface.h" |
chris | 0:163560051396 | 8 | #include "USBEvents.h" |
chris | 0:163560051396 | 9 | |
chris | 0:163560051396 | 10 | |
chris | 0:163560051396 | 11 | /* Get endpoint direction */ |
chris | 0:163560051396 | 12 | #define IN_EP(endpoint) ((endpoint) & 1U ? true : false) |
chris | 0:163560051396 | 13 | #define OUT_EP(endpoint) ((endpoint) & 1U ? false : true) |
chris | 0:163560051396 | 14 | |
chris | 0:163560051396 | 15 | /* Convert physical endpoint number to register bit */ |
chris | 0:163560051396 | 16 | #define EP(endpoint) (1UL<<endpoint) |
chris | 0:163560051396 | 17 | |
chris | 0:163560051396 | 18 | /* Power Control for Peripherals register */ |
chris | 0:163560051396 | 19 | #define PCUSB (1UL<<31) |
chris | 0:163560051396 | 20 | |
chris | 0:163560051396 | 21 | /* USB Clock Control register */ |
chris | 0:163560051396 | 22 | #define DEV_CLK_EN (1UL<<1) |
chris | 0:163560051396 | 23 | #define AHB_CLK_EN (1UL<<4) |
chris | 0:163560051396 | 24 | |
chris | 0:163560051396 | 25 | /* USB Clock Status register */ |
chris | 0:163560051396 | 26 | #define DEV_CLK_ON (1UL<<1) |
chris | 0:163560051396 | 27 | #define AHB_CLK_ON (1UL<<4) |
chris | 0:163560051396 | 28 | |
chris | 0:163560051396 | 29 | /* USB Device Interupt registers */ |
chris | 0:163560051396 | 30 | #define FRAME (1UL<<0) |
chris | 0:163560051396 | 31 | #define EP_FAST (1UL<<1) |
chris | 0:163560051396 | 32 | #define EP_SLOW (1UL<<2) |
chris | 0:163560051396 | 33 | #define DEV_STAT (1UL<<3) |
chris | 0:163560051396 | 34 | #define CCEMPTY (1UL<<4) |
chris | 0:163560051396 | 35 | #define CDFULL (1UL<<5) |
chris | 0:163560051396 | 36 | #define RxENDPKT (1UL<<6) |
chris | 0:163560051396 | 37 | #define TxENDPKT (1UL<<7) |
chris | 0:163560051396 | 38 | #define EP_RLZED (1UL<<8) |
chris | 0:163560051396 | 39 | #define ERR_INT (1UL<<9) |
chris | 0:163560051396 | 40 | |
chris | 0:163560051396 | 41 | /* USB Control register */ |
chris | 0:163560051396 | 42 | #define RD_EN (1<<0) |
chris | 0:163560051396 | 43 | #define WR_EN (1<<1) |
chris | 0:163560051396 | 44 | #define LOG_ENDPOINT(endpoint) ((endpoint>>1)<<2) |
chris | 0:163560051396 | 45 | |
chris | 0:163560051396 | 46 | /* USB Receive Packet Length register */ |
chris | 0:163560051396 | 47 | #define DV (1UL<<10) |
chris | 0:163560051396 | 48 | #define PKT_RDY (1UL<<11) |
chris | 0:163560051396 | 49 | #define PKT_LNGTH_MASK (0x3ff) |
chris | 0:163560051396 | 50 | |
chris | 0:163560051396 | 51 | /* Serial Interface Engine (SIE) */ |
chris | 0:163560051396 | 52 | #define SIE_WRITE (0x01) |
chris | 0:163560051396 | 53 | #define SIE_READ (0x02) |
chris | 0:163560051396 | 54 | #define SIE_COMMAND (0x05) |
chris | 0:163560051396 | 55 | #define SIE_CMD_CODE(phase, data) ((phase<<8)|(data<<16)) |
chris | 0:163560051396 | 56 | |
chris | 0:163560051396 | 57 | /* SIE Command codes */ |
chris | 0:163560051396 | 58 | #define SIE_CMD_SET_ADDRESS (0xD0) |
chris | 0:163560051396 | 59 | #define SIE_CMD_CONFIGURE_DEVICE (0xD8) |
chris | 0:163560051396 | 60 | #define SIE_CMD_SET_MODE (0xF3) |
chris | 0:163560051396 | 61 | #define SIE_CMD_READ_FRAME_NUMBER (0xF5) |
chris | 0:163560051396 | 62 | #define SIE_CMD_READ_TEST_REGISTER (0xFD) |
chris | 0:163560051396 | 63 | #define SIE_CMD_SET_DEVICE_STATUS (0xFE) |
chris | 0:163560051396 | 64 | #define SIE_CMD_GET_DEVICE_STATUS (0xFE) |
chris | 0:163560051396 | 65 | #define SIE_CMD_GET_ERROR_CODE (0xFF) |
chris | 0:163560051396 | 66 | #define SIE_CMD_READ_ERROR_STATUS (0xFB) |
chris | 0:163560051396 | 67 | |
chris | 0:163560051396 | 68 | #define SIE_CMD_SELECT_ENDPOINT(endpoint) (0x00+endpoint) |
chris | 0:163560051396 | 69 | #define SIE_CMD_SELECT_ENDPOINT_CLEAR_INTERRUPT(endpoint) (0x40+endpoint) |
chris | 0:163560051396 | 70 | #define SIE_CMD_SET_ENDPOINT_STATUS(endpoint) (0x40+endpoint) |
chris | 0:163560051396 | 71 | |
chris | 0:163560051396 | 72 | #define SIE_CMD_CLEAR_BUFFER (0xF2) |
chris | 0:163560051396 | 73 | #define SIE_CMD_VALIDATE_BUFFER (0xFA) |
chris | 0:163560051396 | 74 | |
chris | 0:163560051396 | 75 | /* SIE Device Status register */ |
chris | 0:163560051396 | 76 | #define SIE_DS_CON (1<<0) |
chris | 0:163560051396 | 77 | #define SIE_DS_CON_CH (1<<1) |
chris | 0:163560051396 | 78 | #define SIE_DS_SUS (1<<2) |
chris | 0:163560051396 | 79 | #define SIE_DS_SUS_CH (1<<3) |
chris | 0:163560051396 | 80 | #define SIE_DS_RST (1<<4) |
chris | 0:163560051396 | 81 | |
chris | 0:163560051396 | 82 | /* SIE Device Set Address register */ |
chris | 0:163560051396 | 83 | #define SIE_DSA_DEV_EN (1<<7) |
chris | 0:163560051396 | 84 | |
chris | 0:163560051396 | 85 | /* SIE Configue Device register */ |
chris | 0:163560051396 | 86 | #define SIE_CONF_DEVICE (1<<0) |
chris | 0:163560051396 | 87 | |
chris | 0:163560051396 | 88 | /* Select Endpoint register */ |
chris | 0:163560051396 | 89 | #define SIE_SE_FE (1<<0) |
chris | 0:163560051396 | 90 | #define SIE_SE_ST (1<<1) |
chris | 0:163560051396 | 91 | #define SIE_SE_STP (1<<2) |
chris | 0:163560051396 | 92 | #define SIE_SE_PO (1<<3) |
chris | 0:163560051396 | 93 | #define SIE_SE_EPN (1<<4) |
chris | 0:163560051396 | 94 | #define SIE_SE_B_1_FULL (1<<5) |
chris | 0:163560051396 | 95 | #define SIE_SE_B_2_FULL (1<<6) |
chris | 0:163560051396 | 96 | |
chris | 0:163560051396 | 97 | /* Set Endpoint Status command */ |
chris | 0:163560051396 | 98 | #define SIE_SES_ST (1<<0) |
chris | 0:163560051396 | 99 | #define SIE_SES_DA (1<<5) |
chris | 0:163560051396 | 100 | #define SIE_SES_RF_MO (1<<6) |
chris | 0:163560051396 | 101 | #define SIE_SES_CND_ST (1<<7) |
chris | 0:163560051396 | 102 | |
chris | 0:163560051396 | 103 | static uint32_t endpointStallState; |
chris | 0:163560051396 | 104 | |
chris | 0:163560051396 | 105 | static int epComplete = 0; |
chris | 0:163560051396 | 106 | /* |
chris | 0:163560051396 | 107 | * Serial Interface Engine commands |
chris | 0:163560051396 | 108 | */ |
chris | 0:163560051396 | 109 | |
chris | 0:163560051396 | 110 | static void SIECommand(uint32_t command) |
chris | 0:163560051396 | 111 | { |
chris | 0:163560051396 | 112 | /* The command phase of a SIE transaction */ |
chris | 0:163560051396 | 113 | LPC_USB->USBDevIntClr = CCEMPTY; |
chris | 0:163560051396 | 114 | LPC_USB->USBCmdCode = SIE_CMD_CODE(SIE_COMMAND, command); |
chris | 0:163560051396 | 115 | while (!(LPC_USB->USBDevIntSt & CCEMPTY)); |
chris | 0:163560051396 | 116 | } |
chris | 0:163560051396 | 117 | |
chris | 0:163560051396 | 118 | static void SIEWriteData(uint8_t data) |
chris | 0:163560051396 | 119 | { |
chris | 0:163560051396 | 120 | /* The data write phase of a SIE transaction */ |
chris | 0:163560051396 | 121 | LPC_USB->USBDevIntClr = CCEMPTY; |
chris | 0:163560051396 | 122 | LPC_USB->USBCmdCode = SIE_CMD_CODE(SIE_WRITE, data); |
chris | 0:163560051396 | 123 | while (!(LPC_USB->USBDevIntSt & CCEMPTY)); |
chris | 0:163560051396 | 124 | } |
chris | 0:163560051396 | 125 | |
chris | 0:163560051396 | 126 | static uint8_t SIEReadData(uint32_t command) |
chris | 0:163560051396 | 127 | { |
chris | 0:163560051396 | 128 | /* The data read phase of a SIE transaction */ |
chris | 0:163560051396 | 129 | LPC_USB->USBDevIntClr = CDFULL; |
chris | 0:163560051396 | 130 | LPC_USB->USBCmdCode = SIE_CMD_CODE(SIE_READ, command); |
chris | 0:163560051396 | 131 | while (!(LPC_USB->USBDevIntSt & CDFULL)); |
chris | 0:163560051396 | 132 | return (uint8_t)LPC_USB->USBCmdData; |
chris | 0:163560051396 | 133 | } |
chris | 0:163560051396 | 134 | |
chris | 0:163560051396 | 135 | static void SIEsetDeviceStatus(uint8_t status) |
chris | 0:163560051396 | 136 | { |
chris | 0:163560051396 | 137 | /* Write SIE device status register */ |
chris | 0:163560051396 | 138 | SIECommand(SIE_CMD_SET_DEVICE_STATUS); |
chris | 0:163560051396 | 139 | SIEWriteData(status); |
chris | 0:163560051396 | 140 | } |
chris | 0:163560051396 | 141 | |
chris | 0:163560051396 | 142 | static uint8_t SIEgetDeviceStatus(void) |
chris | 0:163560051396 | 143 | { |
chris | 0:163560051396 | 144 | /* Read SIE device status register */ |
chris | 0:163560051396 | 145 | SIECommand(SIE_CMD_GET_DEVICE_STATUS); |
chris | 0:163560051396 | 146 | return SIEReadData(SIE_CMD_GET_DEVICE_STATUS); |
chris | 0:163560051396 | 147 | } |
chris | 0:163560051396 | 148 | |
chris | 0:163560051396 | 149 | void SIEsetAddress(uint8_t address) |
chris | 0:163560051396 | 150 | { |
chris | 0:163560051396 | 151 | /* Write SIE device address register */ |
chris | 0:163560051396 | 152 | SIECommand(SIE_CMD_SET_ADDRESS); |
chris | 0:163560051396 | 153 | SIEWriteData((address & 0x7f) | SIE_DSA_DEV_EN); |
chris | 0:163560051396 | 154 | } |
chris | 0:163560051396 | 155 | |
chris | 0:163560051396 | 156 | static uint8_t SIEselectEndpoint(uint8_t endpoint) |
chris | 0:163560051396 | 157 | { |
chris | 0:163560051396 | 158 | /* SIE select endpoint command */ |
chris | 0:163560051396 | 159 | SIECommand(SIE_CMD_SELECT_ENDPOINT(endpoint)); |
chris | 0:163560051396 | 160 | return SIEReadData(SIE_CMD_SELECT_ENDPOINT(endpoint)); |
chris | 0:163560051396 | 161 | } |
chris | 0:163560051396 | 162 | |
chris | 0:163560051396 | 163 | static uint8_t SIEclearBuffer(void) |
chris | 0:163560051396 | 164 | { |
chris | 0:163560051396 | 165 | /* SIE clear buffer command */ |
chris | 0:163560051396 | 166 | SIECommand(SIE_CMD_CLEAR_BUFFER); |
chris | 0:163560051396 | 167 | return SIEReadData(SIE_CMD_CLEAR_BUFFER); |
chris | 0:163560051396 | 168 | } |
chris | 0:163560051396 | 169 | |
chris | 0:163560051396 | 170 | static void SIEvalidateBuffer(void) |
chris | 0:163560051396 | 171 | { |
chris | 0:163560051396 | 172 | /* SIE validate buffer command */ |
chris | 0:163560051396 | 173 | SIECommand(SIE_CMD_VALIDATE_BUFFER); |
chris | 0:163560051396 | 174 | } |
chris | 0:163560051396 | 175 | |
chris | 0:163560051396 | 176 | static void SIEsetEndpointStatus(uint8_t endpoint, uint8_t status) |
chris | 0:163560051396 | 177 | { |
chris | 0:163560051396 | 178 | /* SIE set endpoint status command */ |
chris | 0:163560051396 | 179 | SIECommand(SIE_CMD_SET_ENDPOINT_STATUS(endpoint)); |
chris | 0:163560051396 | 180 | SIEWriteData(status); |
chris | 0:163560051396 | 181 | } |
chris | 0:163560051396 | 182 | |
chris | 0:163560051396 | 183 | static uint16_t SIEgetFrameNumber(void) __attribute__ ((unused)); |
chris | 0:163560051396 | 184 | static uint16_t SIEgetFrameNumber(void) |
chris | 0:163560051396 | 185 | { |
chris | 0:163560051396 | 186 | /* Read current frame number */ |
chris | 0:163560051396 | 187 | uint16_t lowByte; |
chris | 0:163560051396 | 188 | uint16_t highByte; |
chris | 0:163560051396 | 189 | |
chris | 0:163560051396 | 190 | SIECommand(SIE_CMD_READ_FRAME_NUMBER); |
chris | 0:163560051396 | 191 | lowByte = SIEReadData(SIE_CMD_READ_FRAME_NUMBER); |
chris | 0:163560051396 | 192 | highByte = SIEReadData(SIE_CMD_READ_FRAME_NUMBER); |
chris | 0:163560051396 | 193 | |
chris | 0:163560051396 | 194 | return (highByte << 8) | lowByte; |
chris | 0:163560051396 | 195 | } |
chris | 0:163560051396 | 196 | |
chris | 0:163560051396 | 197 | static void SIEconfigureDevice(void) |
chris | 0:163560051396 | 198 | { |
chris | 0:163560051396 | 199 | /* SIE Configure device command */ |
chris | 0:163560051396 | 200 | SIECommand(SIE_CMD_CONFIGURE_DEVICE); |
chris | 0:163560051396 | 201 | SIEWriteData(SIE_CONF_DEVICE); |
chris | 0:163560051396 | 202 | } |
chris | 0:163560051396 | 203 | |
chris | 0:163560051396 | 204 | static void SIEunconfigureDevice(void) |
chris | 0:163560051396 | 205 | { |
chris | 0:163560051396 | 206 | /* SIE Configure device command */ |
chris | 0:163560051396 | 207 | SIECommand(SIE_CMD_CONFIGURE_DEVICE); |
chris | 0:163560051396 | 208 | SIEWriteData(0); |
chris | 0:163560051396 | 209 | } |
chris | 0:163560051396 | 210 | |
chris | 0:163560051396 | 211 | static void SIEconnect(void) |
chris | 0:163560051396 | 212 | { |
chris | 0:163560051396 | 213 | /* Connect USB device */ |
chris | 0:163560051396 | 214 | uint8_t status; |
chris | 0:163560051396 | 215 | |
chris | 0:163560051396 | 216 | status = SIEgetDeviceStatus(); |
chris | 0:163560051396 | 217 | SIEsetDeviceStatus(status | SIE_DS_CON); |
chris | 0:163560051396 | 218 | } |
chris | 0:163560051396 | 219 | |
chris | 0:163560051396 | 220 | |
chris | 0:163560051396 | 221 | static void SIEdisconnect(void) |
chris | 0:163560051396 | 222 | { |
chris | 0:163560051396 | 223 | /* Disconnect USB device */ |
chris | 0:163560051396 | 224 | uint8_t status; |
chris | 0:163560051396 | 225 | |
chris | 0:163560051396 | 226 | status = SIEgetDeviceStatus(); |
chris | 0:163560051396 | 227 | SIEsetDeviceStatus(status & ~SIE_DS_CON); |
chris | 0:163560051396 | 228 | } |
chris | 0:163560051396 | 229 | |
chris | 0:163560051396 | 230 | /* |
chris | 0:163560051396 | 231 | * Endpoint commands |
chris | 0:163560051396 | 232 | */ |
chris | 0:163560051396 | 233 | |
chris | 0:163560051396 | 234 | static uint8_t selectEndpointClearInterrupt(uint8_t endpoint) |
chris | 0:163560051396 | 235 | { |
chris | 0:163560051396 | 236 | /* Implemented using using EP_INT_CLR. */ |
chris | 0:163560051396 | 237 | LPC_USB->USBEpIntClr = EP(endpoint); |
chris | 0:163560051396 | 238 | while (!(LPC_USB->USBDevIntSt & CDFULL)); |
chris | 0:163560051396 | 239 | return (uint8_t)LPC_USB->USBCmdData; |
chris | 0:163560051396 | 240 | } |
chris | 0:163560051396 | 241 | |
chris | 0:163560051396 | 242 | static void stallEndpoint(uint8_t endpoint) |
chris | 0:163560051396 | 243 | { |
chris | 0:163560051396 | 244 | /* Stall an endpoint */ |
chris | 0:163560051396 | 245 | if ( (endpoint==EP0IN) || (endpoint==EP0OUT) ) |
chris | 0:163560051396 | 246 | { |
chris | 0:163560051396 | 247 | /* Conditionally stall both control endpoints */ |
chris | 0:163560051396 | 248 | SIEsetEndpointStatus(EP0OUT, SIE_SES_CND_ST); |
chris | 0:163560051396 | 249 | } |
chris | 0:163560051396 | 250 | else |
chris | 0:163560051396 | 251 | { |
chris | 0:163560051396 | 252 | SIEsetEndpointStatus(endpoint, SIE_SES_ST); |
chris | 0:163560051396 | 253 | |
chris | 0:163560051396 | 254 | /* Update stall state */ |
chris | 0:163560051396 | 255 | endpointStallState |= EP(endpoint); |
chris | 0:163560051396 | 256 | } |
chris | 0:163560051396 | 257 | } |
chris | 0:163560051396 | 258 | |
chris | 0:163560051396 | 259 | static void unstallEndpoint(uint8_t endpoint) |
chris | 0:163560051396 | 260 | { |
chris | 0:163560051396 | 261 | /* Unstall an endpoint. The endpoint will also be reinitialised */ |
chris | 0:163560051396 | 262 | SIEsetEndpointStatus(endpoint, 0); |
chris | 0:163560051396 | 263 | |
chris | 0:163560051396 | 264 | /* Update stall state */ |
chris | 0:163560051396 | 265 | endpointStallState &= ~EP(endpoint); |
chris | 0:163560051396 | 266 | } |
chris | 0:163560051396 | 267 | |
chris | 0:163560051396 | 268 | static bool getEndpointStallState(uint8_t endpoint) |
chris | 0:163560051396 | 269 | { |
chris | 0:163560051396 | 270 | /* Returns true if endpoint stalled */ |
chris | 0:163560051396 | 271 | return endpointStallState & EP(endpoint); |
chris | 0:163560051396 | 272 | } |
chris | 0:163560051396 | 273 | |
chris | 0:163560051396 | 274 | static void realiseEndpoint(uint8_t endpoint, uint32_t maxPacket) |
chris | 0:163560051396 | 275 | { |
chris | 0:163560051396 | 276 | /* Realise an endpoint */ |
chris | 0:163560051396 | 277 | LPC_USB->USBDevIntClr = EP_RLZED; |
chris | 0:163560051396 | 278 | LPC_USB->USBReEp |= EP(endpoint); |
chris | 0:163560051396 | 279 | LPC_USB->USBEpInd = endpoint; |
chris | 0:163560051396 | 280 | LPC_USB->USBMaxPSize = maxPacket; |
chris | 0:163560051396 | 281 | |
chris | 0:163560051396 | 282 | while (!(LPC_USB->USBDevIntSt & EP_RLZED)); |
chris | 0:163560051396 | 283 | LPC_USB->USBDevIntClr = EP_RLZED; |
chris | 0:163560051396 | 284 | |
chris | 0:163560051396 | 285 | /* Clear stall state */ |
chris | 0:163560051396 | 286 | endpointStallState &= ~EP(endpoint); |
chris | 0:163560051396 | 287 | } |
chris | 0:163560051396 | 288 | |
chris | 0:163560051396 | 289 | static void enableEndpointEvent(uint8_t endpoint) |
chris | 0:163560051396 | 290 | { |
chris | 0:163560051396 | 291 | /* Enable an endpoint interrupt */ |
chris | 0:163560051396 | 292 | LPC_USB->USBEpIntEn |= EP(endpoint); |
chris | 0:163560051396 | 293 | } |
chris | 0:163560051396 | 294 | |
chris | 0:163560051396 | 295 | static void disableEndpointEvent(uint8_t endpoint) __attribute__ ((unused)); |
chris | 0:163560051396 | 296 | static void disableEndpointEvent(uint8_t endpoint) |
chris | 0:163560051396 | 297 | { |
chris | 0:163560051396 | 298 | /* Disable an endpoint interrupt */ |
chris | 0:163560051396 | 299 | LPC_USB->USBEpIntEn &= ~EP(endpoint); |
chris | 0:163560051396 | 300 | } |
chris | 0:163560051396 | 301 | |
chris | 0:163560051396 | 302 | static volatile uint32_t __attribute__((used)) dummyRead; |
chris | 0:163560051396 | 303 | |
chris | 0:163560051396 | 304 | static uint32_t endpointRead(uint8_t endpoint, uint8_t *buffer) |
chris | 0:163560051396 | 305 | { |
chris | 0:163560051396 | 306 | /* Read from an OUT endpoint */ |
chris | 0:163560051396 | 307 | uint32_t size; |
chris | 0:163560051396 | 308 | uint32_t i; |
chris | 0:163560051396 | 309 | uint32_t data; |
chris | 0:163560051396 | 310 | uint8_t offset; |
chris | 0:163560051396 | 311 | |
chris | 0:163560051396 | 312 | LPC_USB->USBCtrl = LOG_ENDPOINT(endpoint) | RD_EN; |
chris | 0:163560051396 | 313 | while (!(LPC_USB->USBRxPLen & PKT_RDY)); |
chris | 0:163560051396 | 314 | |
chris | 0:163560051396 | 315 | size = LPC_USB->USBRxPLen & PKT_LNGTH_MASK; |
chris | 0:163560051396 | 316 | |
chris | 0:163560051396 | 317 | offset = 0; |
chris | 0:163560051396 | 318 | |
chris | 0:163560051396 | 319 | if (size > 0) |
chris | 0:163560051396 | 320 | { |
chris | 0:163560051396 | 321 | for (i=0; i<size; i++) |
chris | 0:163560051396 | 322 | { |
chris | 0:163560051396 | 323 | if (offset==0) |
chris | 0:163560051396 | 324 | { |
chris | 0:163560051396 | 325 | /* Fetch up to four bytes of data as a word */ |
chris | 0:163560051396 | 326 | data = LPC_USB->USBRxData; |
chris | 0:163560051396 | 327 | } |
chris | 0:163560051396 | 328 | |
chris | 0:163560051396 | 329 | /* extract a byte */ |
chris | 0:163560051396 | 330 | *buffer++ = data>>offset; |
chris | 0:163560051396 | 331 | |
chris | 0:163560051396 | 332 | /* move on to the next byte */ |
chris | 0:163560051396 | 333 | offset = (offset + 8) % 32; |
chris | 0:163560051396 | 334 | } |
chris | 0:163560051396 | 335 | } |
chris | 0:163560051396 | 336 | else |
chris | 0:163560051396 | 337 | { |
chris | 0:163560051396 | 338 | dummyRead = LPC_USB->USBRxData; |
chris | 0:163560051396 | 339 | } |
chris | 0:163560051396 | 340 | |
chris | 0:163560051396 | 341 | SIEselectEndpoint(endpoint); |
chris | 0:163560051396 | 342 | SIEclearBuffer(); |
chris | 0:163560051396 | 343 | return size; |
chris | 0:163560051396 | 344 | } |
chris | 0:163560051396 | 345 | |
chris | 0:163560051396 | 346 | static void endpointWrite(uint8_t endpoint, uint8_t *buffer, uint32_t size) |
chris | 0:163560051396 | 347 | { |
chris | 0:163560051396 | 348 | /* Write to an IN endpoint */ |
chris | 0:163560051396 | 349 | uint32_t temp, data; |
chris | 0:163560051396 | 350 | uint8_t offset; |
chris | 0:163560051396 | 351 | |
chris | 0:163560051396 | 352 | LPC_USB->USBCtrl = LOG_ENDPOINT(endpoint) | WR_EN; |
chris | 0:163560051396 | 353 | |
chris | 0:163560051396 | 354 | LPC_USB->USBTxPLen = size; |
chris | 0:163560051396 | 355 | offset = 0; |
chris | 0:163560051396 | 356 | data = 0; |
chris | 0:163560051396 | 357 | |
chris | 0:163560051396 | 358 | if (size>0) |
chris | 0:163560051396 | 359 | { |
chris | 0:163560051396 | 360 | do { |
chris | 0:163560051396 | 361 | /* Fetch next data byte into a word-sized temporary variable */ |
chris | 0:163560051396 | 362 | temp = *buffer++; |
chris | 0:163560051396 | 363 | |
chris | 0:163560051396 | 364 | /* Add to current data word */ |
chris | 0:163560051396 | 365 | temp = temp << offset; |
chris | 0:163560051396 | 366 | data = data | temp; |
chris | 0:163560051396 | 367 | |
chris | 0:163560051396 | 368 | /* move on to the next byte */ |
chris | 0:163560051396 | 369 | offset = (offset + 8) % 32; |
chris | 0:163560051396 | 370 | size--; |
chris | 0:163560051396 | 371 | |
chris | 0:163560051396 | 372 | if ((offset==0) || (size==0)) |
chris | 0:163560051396 | 373 | { |
chris | 0:163560051396 | 374 | /* Write the word to the endpoint */ |
chris | 0:163560051396 | 375 | LPC_USB->USBTxData = data; |
chris | 0:163560051396 | 376 | data = 0; |
chris | 0:163560051396 | 377 | } |
chris | 0:163560051396 | 378 | } while (size>0); |
chris | 0:163560051396 | 379 | } |
chris | 0:163560051396 | 380 | else |
chris | 0:163560051396 | 381 | { |
chris | 0:163560051396 | 382 | LPC_USB->USBTxData = 0; |
chris | 0:163560051396 | 383 | } |
chris | 0:163560051396 | 384 | |
chris | 0:163560051396 | 385 | /* Clear WR_EN to cover zero length packet case */ |
chris | 0:163560051396 | 386 | LPC_USB->USBCtrl=0; |
chris | 0:163560051396 | 387 | |
chris | 0:163560051396 | 388 | SIEselectEndpoint(endpoint); |
chris | 0:163560051396 | 389 | SIEvalidateBuffer(); |
chris | 0:163560051396 | 390 | } |
chris | 0:163560051396 | 391 | |
chris | 0:163560051396 | 392 | /* |
chris | 0:163560051396 | 393 | * USBBusInterface API |
chris | 0:163560051396 | 394 | */ |
chris | 0:163560051396 | 395 | |
chris | 0:163560051396 | 396 | bool USBBusInterface_init(void) |
chris | 0:163560051396 | 397 | { |
chris | 0:163560051396 | 398 | /* Disable IRQ */ |
chris | 0:163560051396 | 399 | NVIC_DisableIRQ(USB_IRQn); |
chris | 0:163560051396 | 400 | |
chris | 0:163560051396 | 401 | /* Enable power to USB device controller */ |
chris | 0:163560051396 | 402 | LPC_SC->PCONP |= PCUSB; |
chris | 0:163560051396 | 403 | |
chris | 0:163560051396 | 404 | /* Enable USB clocks */ |
chris | 0:163560051396 | 405 | LPC_USB->USBClkCtrl |= DEV_CLK_EN | AHB_CLK_EN; |
chris | 0:163560051396 | 406 | while (LPC_USB->USBClkSt != (DEV_CLK_ON | AHB_CLK_ON)); |
chris | 0:163560051396 | 407 | |
chris | 0:163560051396 | 408 | /* Configure pins P0.29 and P0.30 to be USB D+ and USB D- */ |
chris | 0:163560051396 | 409 | LPC_PINCON->PINSEL1 &= 0xc3ffffff; |
chris | 0:163560051396 | 410 | LPC_PINCON->PINSEL1 |= 0x14000000; |
chris | 0:163560051396 | 411 | |
chris | 0:163560051396 | 412 | /* Disconnect USB device */ |
chris | 0:163560051396 | 413 | SIEdisconnect(); |
chris | 0:163560051396 | 414 | |
chris | 0:163560051396 | 415 | /* Configure pin P2.9 to be Connect */ |
chris | 0:163560051396 | 416 | LPC_PINCON->PINSEL4 &= 0xfffcffff; |
chris | 0:163560051396 | 417 | LPC_PINCON->PINSEL4 |= 0x00040000; |
chris | 0:163560051396 | 418 | |
chris | 0:163560051396 | 419 | /* Connect must be low for at least 2.5uS */ |
chris | 0:163560051396 | 420 | wait(0.3); |
chris | 0:163560051396 | 421 | |
chris | 0:163560051396 | 422 | /* Set the maximum packet size for the control endpoints */ |
chris | 0:163560051396 | 423 | realiseEndpoint(EP0IN, MAX_PACKET_SIZE_EP0); |
chris | 0:163560051396 | 424 | realiseEndpoint(EP0OUT, MAX_PACKET_SIZE_EP0); |
chris | 0:163560051396 | 425 | |
chris | 0:163560051396 | 426 | /* Attach IRQ */ |
chris | 0:163560051396 | 427 | NVIC_EnableIRQ(USB_IRQn); |
chris | 0:163560051396 | 428 | |
chris | 0:163560051396 | 429 | /* Enable interrupts for device events and EP0 */ |
chris | 0:163560051396 | 430 | LPC_USB->USBDevIntEn = EP_SLOW | DEV_STAT; |
chris | 0:163560051396 | 431 | enableEndpointEvent(EP0IN); |
chris | 0:163560051396 | 432 | enableEndpointEvent(EP0OUT); |
chris | 0:163560051396 | 433 | return true; |
chris | 0:163560051396 | 434 | } |
chris | 0:163560051396 | 435 | |
chris | 0:163560051396 | 436 | void USBBusInterface_uninit(void) |
chris | 0:163560051396 | 437 | { |
chris | 0:163560051396 | 438 | /* Ensure device disconnected */ |
chris | 0:163560051396 | 439 | SIEdisconnect(); |
chris | 0:163560051396 | 440 | |
chris | 0:163560051396 | 441 | /* Disable USB interrupts */ |
chris | 0:163560051396 | 442 | NVIC_DisableIRQ(USB_IRQn); |
chris | 0:163560051396 | 443 | } |
chris | 0:163560051396 | 444 | |
chris | 0:163560051396 | 445 | void USBBusInterface_connect(void) |
chris | 0:163560051396 | 446 | { |
chris | 0:163560051396 | 447 | /* Connect USB device */ |
chris | 0:163560051396 | 448 | SIEconnect(); |
chris | 0:163560051396 | 449 | } |
chris | 0:163560051396 | 450 | |
chris | 0:163560051396 | 451 | void USBBusInterface_disconnect(void) |
chris | 0:163560051396 | 452 | { |
chris | 0:163560051396 | 453 | /* Disconnect USB device */ |
chris | 0:163560051396 | 454 | SIEdisconnect(); |
chris | 0:163560051396 | 455 | } |
chris | 0:163560051396 | 456 | |
chris | 0:163560051396 | 457 | void USBBusInterface_configureDevice(void) |
chris | 0:163560051396 | 458 | { |
chris | 0:163560051396 | 459 | SIEconfigureDevice(); |
chris | 0:163560051396 | 460 | } |
chris | 0:163560051396 | 461 | |
chris | 0:163560051396 | 462 | void USBBusInterface_unconfigureDevice(void) |
chris | 0:163560051396 | 463 | { |
chris | 0:163560051396 | 464 | SIEunconfigureDevice(); |
chris | 0:163560051396 | 465 | } |
chris | 0:163560051396 | 466 | |
chris | 0:163560051396 | 467 | void USBBusInterface_setAddress(uint8_t address) |
chris | 0:163560051396 | 468 | { |
chris | 0:163560051396 | 469 | SIEsetAddress(address); |
chris | 0:163560051396 | 470 | } |
chris | 0:163560051396 | 471 | |
chris | 0:163560051396 | 472 | void USBBusInterface_EP0setup(uint8_t *buffer) |
chris | 0:163560051396 | 473 | { |
chris | 0:163560051396 | 474 | endpointRead(EP0OUT, buffer); |
chris | 0:163560051396 | 475 | } |
chris | 0:163560051396 | 476 | |
chris | 0:163560051396 | 477 | void USBBusInterface_EP0read(void) |
chris | 0:163560051396 | 478 | { |
chris | 0:163560051396 | 479 | /* Not required */ |
chris | 0:163560051396 | 480 | } |
chris | 0:163560051396 | 481 | |
chris | 0:163560051396 | 482 | uint32_t USBBusInterface_EP0getReadResult(uint8_t *buffer) |
chris | 0:163560051396 | 483 | { |
chris | 0:163560051396 | 484 | return endpointRead(EP0OUT, buffer); |
chris | 0:163560051396 | 485 | } |
chris | 0:163560051396 | 486 | |
chris | 0:163560051396 | 487 | void USBBusInterface_EP0write(uint8_t *buffer, uint32_t size) |
chris | 0:163560051396 | 488 | { |
chris | 0:163560051396 | 489 | endpointWrite(EP0IN, buffer, size); |
chris | 0:163560051396 | 490 | } |
chris | 0:163560051396 | 491 | |
chris | 0:163560051396 | 492 | void USBBusInterface_EP0getWriteResult(void) |
chris | 0:163560051396 | 493 | { |
chris | 0:163560051396 | 494 | /* Not required */ |
chris | 0:163560051396 | 495 | } |
chris | 0:163560051396 | 496 | |
chris | 0:163560051396 | 497 | void USBBusInterface_EP0stall(void) |
chris | 0:163560051396 | 498 | { |
chris | 0:163560051396 | 499 | /* This will stall both control endpoints */ |
chris | 0:163560051396 | 500 | stallEndpoint(EP0OUT); |
chris | 0:163560051396 | 501 | } |
chris | 0:163560051396 | 502 | |
chris | 0:163560051396 | 503 | EP_STATUS USBBusInterface_endpointRead(uint8_t endpoint, uint8_t *data, uint32_t maximumSize) |
chris | 0:163560051396 | 504 | { |
chris | 0:163560051396 | 505 | if (getEndpointStallState(endpoint)) |
chris | 0:163560051396 | 506 | { |
chris | 0:163560051396 | 507 | return EP_STALLED; |
chris | 0:163560051396 | 508 | } |
chris | 0:163560051396 | 509 | |
chris | 0:163560051396 | 510 | return EP_PENDING; |
chris | 0:163560051396 | 511 | } |
chris | 0:163560051396 | 512 | |
chris | 0:163560051396 | 513 | EP_STATUS USBBusInterface_endpointReadResult(uint8_t endpoint, uint32_t *bytesRead) |
chris | 0:163560051396 | 514 | { |
chris | 0:163560051396 | 515 | return EP_PENDING; |
chris | 0:163560051396 | 516 | } |
chris | 0:163560051396 | 517 | |
chris | 0:163560051396 | 518 | EP_STATUS USBBusInterface_endpointWrite(uint8_t endpoint, uint8_t *data, uint32_t size) |
chris | 0:163560051396 | 519 | { |
chris | 0:163560051396 | 520 | if (getEndpointStallState(endpoint)) |
chris | 0:163560051396 | 521 | { |
chris | 0:163560051396 | 522 | return EP_STALLED; |
chris | 0:163560051396 | 523 | } |
chris | 0:163560051396 | 524 | |
chris | 0:163560051396 | 525 | epComplete &= EP(endpoint); |
chris | 0:163560051396 | 526 | |
chris | 0:163560051396 | 527 | endpointWrite(endpoint, data, size); |
chris | 0:163560051396 | 528 | return EP_PENDING; |
chris | 0:163560051396 | 529 | } |
chris | 0:163560051396 | 530 | |
chris | 0:163560051396 | 531 | EP_STATUS USBBusInterface_endpointWriteResult(uint8_t endpoint) |
chris | 0:163560051396 | 532 | { |
chris | 0:163560051396 | 533 | if (epComplete & EP(endpoint)) |
chris | 0:163560051396 | 534 | { |
chris | 0:163560051396 | 535 | epComplete &= ~EP(endpoint); |
chris | 0:163560051396 | 536 | return EP_COMPLETED; |
chris | 0:163560051396 | 537 | } |
chris | 0:163560051396 | 538 | |
chris | 0:163560051396 | 539 | return EP_PENDING; |
chris | 0:163560051396 | 540 | } |
chris | 0:163560051396 | 541 | |
chris | 0:163560051396 | 542 | bool USBBusInterface_realiseEndpoint(uint8_t endpoint, uint32_t maxPacket, uint32_t flags) |
chris | 0:163560051396 | 543 | { |
chris | 0:163560051396 | 544 | realiseEndpoint(endpoint, maxPacket); |
chris | 0:163560051396 | 545 | enableEndpointEvent(endpoint); |
chris | 0:163560051396 | 546 | return true; |
chris | 0:163560051396 | 547 | } |
chris | 0:163560051396 | 548 | |
chris | 0:163560051396 | 549 | void USBBusInterface_stallEndpoint(uint8_t endpoint) |
chris | 0:163560051396 | 550 | { |
chris | 0:163560051396 | 551 | stallEndpoint(endpoint); |
chris | 0:163560051396 | 552 | } |
chris | 0:163560051396 | 553 | |
chris | 0:163560051396 | 554 | void USBBusInterface_unstallEndpoint(uint8_t endpoint) |
chris | 0:163560051396 | 555 | { |
chris | 0:163560051396 | 556 | unstallEndpoint(endpoint); |
chris | 0:163560051396 | 557 | } |
chris | 0:163560051396 | 558 | |
chris | 0:163560051396 | 559 | bool USBBusInterface_getEndpointStallState(uint8_t endpoint) |
chris | 0:163560051396 | 560 | { |
chris | 0:163560051396 | 561 | return getEndpointStallState(endpoint); |
chris | 0:163560051396 | 562 | } |
chris | 0:163560051396 | 563 | |
chris | 0:163560051396 | 564 | void USBBusInterface_remoteWakeup(void) |
chris | 0:163560051396 | 565 | { |
chris | 0:163560051396 | 566 | /* Remote wakeup */ |
chris | 0:163560051396 | 567 | uint8_t status; |
chris | 0:163560051396 | 568 | |
chris | 0:163560051396 | 569 | /* Enable USB clocks */ |
chris | 0:163560051396 | 570 | LPC_USB->USBClkCtrl |= DEV_CLK_EN | AHB_CLK_EN; |
chris | 0:163560051396 | 571 | while (LPC_USB->USBClkSt != (DEV_CLK_ON | AHB_CLK_ON)); |
chris | 0:163560051396 | 572 | |
chris | 0:163560051396 | 573 | status = SIEgetDeviceStatus(); |
chris | 0:163560051396 | 574 | SIEsetDeviceStatus(status & ~SIE_DS_SUS); |
chris | 0:163560051396 | 575 | } |
chris | 0:163560051396 | 576 | |
chris | 0:163560051396 | 577 | /* |
chris | 0:163560051396 | 578 | * USB interrupt handler |
chris | 0:163560051396 | 579 | */ |
chris | 0:163560051396 | 580 | |
chris | 0:163560051396 | 581 | extern "C" |
chris | 0:163560051396 | 582 | { |
chris | 0:163560051396 | 583 | void USB_IRQHandler(void) |
chris | 0:163560051396 | 584 | { |
chris | 0:163560051396 | 585 | uint8_t devStat; |
chris | 0:163560051396 | 586 | |
chris | 0:163560051396 | 587 | if (LPC_USB->USBDevIntSt & FRAME) |
chris | 0:163560051396 | 588 | { |
chris | 0:163560051396 | 589 | /* Start of frame event */ |
chris | 0:163560051396 | 590 | USBDevice_SOF(SIEgetFrameNumber()); |
chris | 0:163560051396 | 591 | /* Clear interrupt status flag */ |
chris | 0:163560051396 | 592 | LPC_USB->USBDevIntClr = FRAME; |
chris | 0:163560051396 | 593 | } |
chris | 0:163560051396 | 594 | |
chris | 0:163560051396 | 595 | if (LPC_USB->USBDevIntSt & DEV_STAT) |
chris | 0:163560051396 | 596 | { |
chris | 0:163560051396 | 597 | /* Device Status interrupt */ |
chris | 0:163560051396 | 598 | /* Must clear the interrupt status flag before reading the device status from the SIE */ |
chris | 0:163560051396 | 599 | LPC_USB->USBDevIntClr = DEV_STAT; |
chris | 0:163560051396 | 600 | |
chris | 0:163560051396 | 601 | /* Read device status from SIE */ |
chris | 0:163560051396 | 602 | devStat = SIEgetDeviceStatus(); |
chris | 0:163560051396 | 603 | |
chris | 0:163560051396 | 604 | if (devStat & SIE_DS_RST) |
chris | 0:163560051396 | 605 | { |
chris | 0:163560051396 | 606 | /* Bus reset */ |
chris | 0:163560051396 | 607 | USBDevice_busReset(); |
chris | 0:163560051396 | 608 | } |
chris | 0:163560051396 | 609 | } |
chris | 0:163560051396 | 610 | |
chris | 0:163560051396 | 611 | if (LPC_USB->USBDevIntSt & EP_SLOW) |
chris | 0:163560051396 | 612 | { |
chris | 0:163560051396 | 613 | /* (Slow) Endpoint Interrupt */ |
chris | 0:163560051396 | 614 | |
chris | 0:163560051396 | 615 | /* Process each endpoint interrupt */ |
chris | 0:163560051396 | 616 | if (LPC_USB->USBEpIntSt & EP(EP0OUT)) |
chris | 0:163560051396 | 617 | { |
chris | 0:163560051396 | 618 | if (selectEndpointClearInterrupt(EP0OUT) & SIE_SE_STP) |
chris | 0:163560051396 | 619 | { |
chris | 0:163560051396 | 620 | /* this is a setup packet */ |
chris | 0:163560051396 | 621 | USBDevice_EP0setup(); |
chris | 0:163560051396 | 622 | } |
chris | 0:163560051396 | 623 | else |
chris | 0:163560051396 | 624 | { |
chris | 0:163560051396 | 625 | USBDevice_EP0out(); |
chris | 0:163560051396 | 626 | } |
chris | 0:163560051396 | 627 | } |
chris | 0:163560051396 | 628 | |
chris | 0:163560051396 | 629 | if (LPC_USB->USBEpIntSt & EP(EP0IN)) |
chris | 0:163560051396 | 630 | { |
chris | 0:163560051396 | 631 | selectEndpointClearInterrupt(EP0IN); |
chris | 0:163560051396 | 632 | USBDevice_EP0in(); |
chris | 0:163560051396 | 633 | } |
chris | 0:163560051396 | 634 | |
chris | 0:163560051396 | 635 | /* TODO: This should cover all endpoints, not just EP1,2,3:*/ |
chris | 0:163560051396 | 636 | if (LPC_USB->USBEpIntSt & EP(EP1IN)) |
chris | 0:163560051396 | 637 | { |
chris | 0:163560051396 | 638 | selectEndpointClearInterrupt(EP1IN); |
chris | 0:163560051396 | 639 | epComplete |= EP(EP1IN); |
chris | 0:163560051396 | 640 | } |
chris | 0:163560051396 | 641 | |
chris | 0:163560051396 | 642 | if (LPC_USB->USBEpIntSt & EP(EP1OUT)) |
chris | 0:163560051396 | 643 | { |
chris | 0:163560051396 | 644 | selectEndpointClearInterrupt(EP1OUT); |
chris | 0:163560051396 | 645 | epComplete |= EP(EP1OUT); |
chris | 0:163560051396 | 646 | } |
chris | 0:163560051396 | 647 | |
chris | 0:163560051396 | 648 | if (LPC_USB->USBEpIntSt & EP(EP2IN)) |
chris | 0:163560051396 | 649 | { |
chris | 0:163560051396 | 650 | selectEndpointClearInterrupt(EP2IN); |
chris | 0:163560051396 | 651 | epComplete |= EP(EP2IN); |
chris | 0:163560051396 | 652 | } |
chris | 0:163560051396 | 653 | |
chris | 0:163560051396 | 654 | if (LPC_USB->USBEpIntSt & EP(EP2OUT)) |
chris | 0:163560051396 | 655 | { |
chris | 0:163560051396 | 656 | selectEndpointClearInterrupt(EP2OUT); |
chris | 0:163560051396 | 657 | epComplete |= EP(EP2OUT); |
chris | 0:163560051396 | 658 | } |
chris | 0:163560051396 | 659 | |
chris | 0:163560051396 | 660 | if (LPC_USB->USBEpIntSt & EP(EP3IN)) |
chris | 0:163560051396 | 661 | { |
chris | 0:163560051396 | 662 | selectEndpointClearInterrupt(EP3IN); |
chris | 0:163560051396 | 663 | epComplete |= EP(EP3IN); |
chris | 0:163560051396 | 664 | } |
chris | 0:163560051396 | 665 | |
chris | 0:163560051396 | 666 | if (LPC_USB->USBEpIntSt & EP(EP3OUT)) |
chris | 0:163560051396 | 667 | { |
chris | 0:163560051396 | 668 | selectEndpointClearInterrupt(EP3OUT); |
chris | 0:163560051396 | 669 | epComplete |= EP(EP3OUT); |
chris | 0:163560051396 | 670 | } |
chris | 0:163560051396 | 671 | |
chris | 0:163560051396 | 672 | /* Clear interrupt status flag */ |
chris | 0:163560051396 | 673 | /* EP_SLOW and EP_FAST interrupt bits should be cleared after the corresponding endpoint interrupts are cleared. */ |
chris | 0:163560051396 | 674 | LPC_USB->USBDevIntClr = EP_SLOW; |
chris | 0:163560051396 | 675 | } |
chris | 0:163560051396 | 676 | } |
chris | 0:163560051396 | 677 | } |
chris | 0:163560051396 | 678 | |
chris | 0:163560051396 | 679 | #endif |