target_reset_lpc4088.c

00001 /**
00002  * @file    target_reset.c
00003  * @brief   Target reset for the lpc4088
00004  *
00005  * DAPLink Interface Firmware
00006  * Copyright (c) 2009-2019, ARM Limited, All Rights Reserved
00007  * SPDX-License-Identifier: Apache-2.0
00008  *
00009  * Licensed under the Apache License, Version 2.0 (the "License"); you may
00010  * not use this file except in compliance with the License.
00011  * You may obtain a copy of the License at
00012  *
00013  * http://www.apache.org/licenses/LICENSE-2.0
00014  *
00015  * Unless required by applicable law or agreed to in writing, software
00016  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
00017  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00018  * See the License for the specific language governing permissions and
00019  * limitations under the License.
00020  */
00021 
00022 #include "swd_host.h"
00023 #include "gpio.h"
00024 #include "target_family.h"
00025 
00026 #define PIN_ISPCTRL1      (1<<12)
00027 #define PIN_ISPCTRL2      (1<<15)
00028 
00029 static void gpio_set_isp_pin(uint8_t state) {
00030     if (state) {
00031         // High => Both pins are inputs
00032         LPC_GPIO->DIR[0] &= ~(PIN_ISPCTRL1);
00033         LPC_GPIO->DIR[1] &= ~(PIN_ISPCTRL2);
00034     } else {
00035         // Low => Both pins are outputs with 0
00036         LPC_GPIO->CLR[0] = (PIN_ISPCTRL1);
00037         LPC_GPIO->CLR[1] = (PIN_ISPCTRL2);
00038         LPC_GPIO->DIR[0] |= (PIN_ISPCTRL1);
00039         LPC_GPIO->DIR[1] |= (PIN_ISPCTRL2);
00040     }
00041 }
00042 
00043 static void prerun_target_config(void)
00044 {
00045     // Configure ISPCTRL as output and high
00046     // We use two ISP pins to cover different hardware versions
00047     LPC_IOCON->TMS_PIO0_12 |= 0x01;
00048     LPC_IOCON->PIO1_15 &= ~0x07;
00049     gpio_set_isp_pin(1);
00050 }
00051 
00052 
00053 static uint8_t lpc4088_target_set_state(target_state_t state)
00054 {
00055     //return swd_set_target_state_hw(state);
00056     uint8_t res;
00057     if (state == RESET_PROGRAM)
00058     {
00059         gpio_set_isp_pin(0);
00060         res = swd_set_target_state_hw(state);
00061         gpio_set_isp_pin(1);
00062     }
00063     else
00064     {
00065         gpio_set_isp_pin(1);
00066         res = swd_set_target_state_hw(state);
00067     }
00068     return res;
00069 }
00070 
00071 const target_family_descriptor_t g_nxp_lpc4088 = {
00072     .family_id  = VENDOR_TO_FAMILY(kNXP_VendorID, 0), //ID not maching the predefined family ids
00073     .prerun_target_config = prerun_target_config,
00074     .target_set_state = lpc4088_target_set_state,
00075 };
00076 
00077 const target_family_descriptor_t *g_target_family = &g_nxp_lpc4088;
00078