From b437a3ca225ac08442ad78672a00b4a35f3a0562 Mon Sep 17 00:00:00 2001 From: Matthew Else Date: Wed, 7 Aug 2013 09:43:28 +0100 Subject: [PATCH] Removed can_api.c from TARGET_LPC11CXX, as it's not ready for pull request yet. --- .../hal/TARGET_NXP/TARGET_LPC11CXX/can_api.c | 334 ------------------ 1 file changed, 334 deletions(-) delete mode 100644 libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11CXX/can_api.c diff --git a/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11CXX/can_api.c b/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11CXX/can_api.c deleted file mode 100644 index 001e9b09d4..0000000000 --- a/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC11CXX/can_api.c +++ /dev/null @@ -1,334 +0,0 @@ -/* mbed Microcontroller Library - * Copyright (c) 2006-2013 ARM Limited - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#include "can_api.h" - -#include "cmsis.h" -#include "pinmap.h" -#include "error.h" - -#include -#include -#warning (matthewelse) Uses LPC1768 code, and hasn't been ported yet... -#if 0 -// Type definition to hold a CAN message -struct CANMsg { - unsigned int reserved1 : 16; - unsigned int dlc : 4; // Bits 16..19: DLC - Data Length Counter - unsigned int reserved0 : 10; - unsigned int rtr : 1; // Bit 30: Set if this is a RTR message - unsigned int type : 1; // Bit 31: Set if this is a 29-bit ID message - unsigned int id; // CAN Message ID (11-bit or 29-bit) - unsigned char data[8]; // CAN Message Data Bytes 0-7 -}; -typedef struct CANMsg CANMsg; - -static uint32_t can_irq_id = 0; -static can_irq_handler irq_handler; - -static uint32_t can_disable(can_t *obj) { - uint32_t sm = LPC_CAN->CNTL; - LPC_CAN->CNTL |= 1; - return sm; -} - -static inline void can_enable(can_t *obj) { - if (LPC_CAN->CNTL & 1) { - LPC_CAN->CNTL &= ~(1); - } -} - -int can_mode(can_t *obj, CanMode mode) -{ - return 0; // not implemented -} - -static inline void can_irq(uint32_t icr, uint32_t index) { - uint32_t i; - - for(i = 0; i < 8; i++) - { - if((can_irq_id != 0) && (icr & (1 << i))) - { - switch (i) { - case 0: irq_handler(can_irq_id, IRQ_RX); break; - case 1: irq_handler(can_irq_id, IRQ_TX); break; - case 2: irq_handler(can_irq_id, IRQ_ERROR); break; - case 3: irq_handler(can_irq_id, IRQ_OVERRUN); break; - case 4: irq_handler(can_irq_id, IRQ_WAKEUP); break; - case 5: irq_handler(can_irq_id, IRQ_PASSIVE); break; - case 6: irq_handler(can_irq_id, IRQ_ARB); break; - case 7: irq_handler(can_irq_id, IRQ_BUS); break; - case 8: irq_handler(can_irq_id, IRQ_READY); break; - } - } - } -} - -// Have to check that the CAN block is active before reading the Interrupt -// Control Register, or the mbed hangs -void can_irq_n() { - uint32_t icr; - - if(LPC_SYSCON->PCONP & (1 << 13)) { - //icr = LPC_CAN1->ICR & 0x1FF; - can_irq(icr, 0); - } -} - -// Register CAN object's irq handler -void can_irq_init(can_t *obj, can_irq_handler handler, uint32_t id) { - irq_handler = handler; - can_irq_id = id; -} - -// Unregister CAN object's irq handler -void can_irq_free(can_t *obj) { - LPC_CAN->CNTL &= ~(1 << 1); // Disable Interrupts :) - - can_irq_id = 0; - NVIC_DisableIRQ(CAN_IRQn); -} - -// Clear or set a irq -void can_irq_set(can_t *obj, CanIrqType type, uint32_t enable) { - uint32_t ier; - - switch (type) { - case IRQ_RX: ier = (1 << 0); break; - case IRQ_TX: ier = (1 << 1); break; - case IRQ_ERROR: ier = (1 << 2); break; - case IRQ_OVERRUN: ier = (1 << 3); break; - case IRQ_WAKEUP: ier = (1 << 4); break; - case IRQ_PASSIVE: ier = (1 << 5); break; - case IRQ_ARB: ier = (1 << 6); break; - case IRQ_BUS: ier = (1 << 7); break; - case IRQ_READY: ier = (1 << 8); break; - default: return; - } - - // Put CAN in Reset Mode. - LPC_CAN->CNTL |= 1; - if(enable == 0) { - LPC_CAN->CNTL &= ~(1 << ier); - } - else { - LPC_CAN->CNTL &= ~(1 << ier); - } - // Take it out of reset... - LPC_CAN->CNTL &= ~(1); - - // Enable NVIC if at least 1 interrupt is active - NVIC_SetVector(CAN_IRQn, (uint32_t) &can_irq_n); - NVIC_EnableIRQ(CAN_IRQn); -} - -// This table has the sampling points as close to 75% as possible. The first -// value is TSEG1, the second TSEG2. -static const int timing_pts[23][2] = { - {0x0, 0x0}, // 2, 50% - {0x1, 0x0}, // 3, 67% - {0x2, 0x0}, // 4, 75% - {0x3, 0x0}, // 5, 80% - {0x3, 0x1}, // 6, 67% - {0x4, 0x1}, // 7, 71% - {0x5, 0x1}, // 8, 75% - {0x6, 0x1}, // 9, 78% - {0x6, 0x2}, // 10, 70% - {0x7, 0x2}, // 11, 73% - {0x8, 0x2}, // 12, 75% - {0x9, 0x2}, // 13, 77% - {0x9, 0x3}, // 14, 71% - {0xA, 0x3}, // 15, 73% - {0xB, 0x3}, // 16, 75% - {0xC, 0x3}, // 17, 76% - {0xD, 0x3}, // 18, 78% - {0xD, 0x4}, // 19, 74% - {0xE, 0x4}, // 20, 75% - {0xF, 0x4}, // 21, 76% - {0xF, 0x5}, // 22, 73% - {0xF, 0x6}, // 23, 70% - {0xF, 0x7}, // 24, 67% -}; - -static unsigned int can_speed(unsigned int sclk, unsigned int cclk, unsigned char psjw) { - #warning (matthewelse) This is the bit that I'm going to have no clue about :P - uint32_t btr; - uint16_t brp = 0; - uint32_t calcbit; - uint32_t bitwidth; - int hit = 0; - int bits; - - #warning the calculation of bitwidth may be wrong... - bitwidth = sclk / cclk; - - brp = bitwidth / 0x18; - while ((!hit) && (brp < bitwidth / 4)) { - brp++; - for (bits = 22; bits > 0; bits--) { - calcbit = (bits + 3) * (brp + 1); - if (calcbit == bitwidth) { - hit = 1; - break; - } - } - } - - if (hit) { - btr = ((timing_pts[bits][1] << 20) & 0x00700000) - | ((timing_pts[bits][0] << 16) & 0x000F0000) - | ((psjw << 14) & 0x0000C000) - | ((brp << 0) & 0x000003FF); - } else { - btr = 0xFFFFFFFF; - } - - return btr; - -} - -void can_init(can_t *obj, PinName rd, PinName td) { - LPC_SYSCON->SYSAHBCLKCTRL |= 1 << 17; - obj->index = 0; - can_reset(obj); - LPC_CAN->CNTL &= ~(1 << 2); // Disable Interrupts - can_frequency(obj, 100000); - - // This would be the place to include filter :) - #warning (matthewelse) This doesn't yet implement filters :( -} - -void can_free(can_t *obj) { - LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 17); -} - -int can_frequency(can_t *obj, int f) { - int btr = can_speed(SystemCoreClock, (unsigned int)f, 1); -#if 0 - if (btr > 0) { - uint32_t modmask = can_disable(obj); - obj->dev->BTR = btr; - obj->dev->MOD = modmask; - return 1; - } else { - return 0; - } -#endif -} - -int can_write(can_t *obj, CAN_Message msg, int cc) { - unsigned int CANStatus; - CANMsg m; - - can_enable(obj); - - m.id = msg.id ; - m.dlc = msg.len & 0xF; - m.rtr = msg.type; - m.type = msg.format; - memcpy(m.data, msg.data, msg.len); - const unsigned int *buf = (const unsigned int *)&m; - - CANStatus = obj->dev->SR; - if (CANStatus & 0x00000004) { - obj->dev->TFI1 = buf[0] & 0xC00F0000; - obj->dev->TID1 = buf[1]; - obj->dev->TDA1 = buf[2]; - obj->dev->TDB1 = buf[3]; - if(cc) { - obj->dev->CMR = 0x30; - } else { - obj->dev->CMR = 0x21; - } - return 1; - - } else if (CANStatus & 0x00000400) { - obj->dev->TFI2 = buf[0] & 0xC00F0000; - obj->dev->TID2 = buf[1]; - obj->dev->TDA2 = buf[2]; - obj->dev->TDB2 = buf[3]; - if (cc) { - obj->dev->CMR = 0x50; - } else { - obj->dev->CMR = 0x41; - } - return 1; - - } else if (CANStatus & 0x00040000) { - obj->dev->TFI3 = buf[0] & 0xC00F0000; - obj->dev->TID3 = buf[1]; - obj->dev->TDA3 = buf[2]; - obj->dev->TDB3 = buf[3]; - if (cc) { - obj->dev->CMR = 0x90; - } else { - obj->dev->CMR = 0x81; - } - return 1; - } - - return 0; -} - -int can_read(can_t *obj, CAN_Message *msg) { - CANMsg x; - unsigned int *i = (unsigned int *)&x; - - can_enable(obj); - - if (obj->dev->GSR & 0x1) { - *i++ = obj->dev->RFS; // Frame - *i++ = obj->dev->RID; // ID - *i++ = obj->dev->RDA; // Data A - *i++ = obj->dev->RDB; // Data B - obj->dev->CMR = 0x04; // release receive buffer - - msg->id = x.id; - msg->len = x.dlc; - msg->format = (x.type)? CANExtended : CANStandard; - msg->type = (x.rtr)? CANRemote: CANData; - memcpy(msg->data,x.data,x.dlc); - return 1; - } - - return 0; -} - -void can_reset(can_t *obj) { - can_disable(obj); - obj->dev->GSR = 0; // Reset error counter when CAN1MOD is in reset -} - -unsigned char can_rderror(can_t *obj) { - return (obj->dev->GSR >> 16) & 0xFF; -} - -unsigned char can_tderror(can_t *obj) { - return (obj->dev->GSR >> 24) & 0xFF; -} - -void can_monitor(can_t *obj, int silent) { - uint32_t mod_mask = can_disable(obj); - if (silent) { - obj->dev->MOD |= (1 << 1); - } else { - obj->dev->MOD &= ~(1 << 1); - } - if (!(mod_mask & 1)) { - can_enable(obj); - } -} -#endif