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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_Maxim/TARGET_MAX32610/system_max32610.c@538:3c6246291cdb, 2015-05-11 (annotated)

Committer:
mbed_official
Date:
Mon May 11 08:15:07 2015 +0100
Revision:
538:3c6246291cdb
Parent:
515:7467ef1f4ad8
Child:
572:c6226b743616
Synchronized with git revision 77b4a7bc786dd2baf633cc7140deb6b0d6ec4463



Full URL: https://github.com/mbedmicro/mbed/commit/77b4a7bc786dd2baf633cc7140deb6b0d6ec4463/



MAX32600MBED,MAXWSNENV - addressed low-power ticker corner cases

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 507:d4fc7603a669 1 /*******************************************************************************
mbed_official 507:d4fc7603a669 2 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
mbed_official 507:d4fc7603a669 3 *
mbed_official 507:d4fc7603a669 4 * Permission is hereby granted, free of charge, to any person obtaining a
mbed_official 507:d4fc7603a669 5 * copy of this software and associated documentation files (the "Software"),
mbed_official 507:d4fc7603a669 6 * to deal in the Software without restriction, including without limitation
mbed_official 507:d4fc7603a669 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
mbed_official 507:d4fc7603a669 8 * and/or sell copies of the Software, and to permit persons to whom the
mbed_official 507:d4fc7603a669 9 * Software is furnished to do so, subject to the following conditions:
mbed_official 507:d4fc7603a669 10 *
mbed_official 507:d4fc7603a669 11 * The above copyright notice and this permission notice shall be included
mbed_official 507:d4fc7603a669 12 * in all copies or substantial portions of the Software.
mbed_official 507:d4fc7603a669 13 *
mbed_official 507:d4fc7603a669 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
mbed_official 507:d4fc7603a669 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
mbed_official 507:d4fc7603a669 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
mbed_official 507:d4fc7603a669 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
mbed_official 507:d4fc7603a669 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
mbed_official 507:d4fc7603a669 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
mbed_official 507:d4fc7603a669 20 * OTHER DEALINGS IN THE SOFTWARE.
mbed_official 507:d4fc7603a669 21 *
mbed_official 507:d4fc7603a669 22 * Except as contained in this notice, the name of Maxim Integrated
mbed_official 507:d4fc7603a669 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
mbed_official 507:d4fc7603a669 24 * Products, Inc. Branding Policy.
mbed_official 507:d4fc7603a669 25 *
mbed_official 507:d4fc7603a669 26 * The mere transfer of this software does not imply any licenses
mbed_official 507:d4fc7603a669 27 * of trade secrets, proprietary technology, copyrights, patents,
mbed_official 507:d4fc7603a669 28 * trademarks, maskwork rights, or any other form of intellectual
mbed_official 507:d4fc7603a669 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
mbed_official 507:d4fc7603a669 30 * ownership rights.
mbed_official 507:d4fc7603a669 31 *******************************************************************************
mbed_official 507:d4fc7603a669 32 */
mbed_official 507:d4fc7603a669 33
mbed_official 507:d4fc7603a669 34 #include "max32610.h"
mbed_official 507:d4fc7603a669 35 #include "clkman_regs.h"
mbed_official 507:d4fc7603a669 36 #include "pwrman_regs.h"
mbed_official 507:d4fc7603a669 37 #include "ioman_regs.h"
mbed_official 507:d4fc7603a669 38 #include "trim_regs.h"
mbed_official 507:d4fc7603a669 39 #include "flc_regs.h"
mbed_official 507:d4fc7603a669 40 #include "pwrseq_regs.h"
mbed_official 507:d4fc7603a669 41 #include "dac_regs.h"
mbed_official 507:d4fc7603a669 42 #include "icc_regs.h"
mbed_official 507:d4fc7603a669 43
mbed_official 507:d4fc7603a669 44 /* Application developer should override where necessary with different external HFX source */
mbed_official 507:d4fc7603a669 45 #ifndef __SYSTEM_HFX
mbed_official 507:d4fc7603a669 46 #define __SYSTEM_HFX 24000000
mbed_official 507:d4fc7603a669 47 #endif
mbed_official 507:d4fc7603a669 48
mbed_official 507:d4fc7603a669 49 uint32_t SystemCoreClock = 24000000;
mbed_official 507:d4fc7603a669 50
mbed_official 507:d4fc7603a669 51 void SystemCoreClockUpdate(void)
mbed_official 507:d4fc7603a669 52 {
mbed_official 507:d4fc7603a669 53 switch ((MXC_CLKMAN->clk_ctrl & MXC_F_CLKMAN_CLK_CTRL_SYSTEM_SOURCE_SELECT) >> MXC_F_CLKMAN_CLK_CTRL_SYSTEM_SOURCE_SELECT_POS) {
mbed_official 507:d4fc7603a669 54 case MXC_E_CLKMAN_SYSTEM_SOURCE_SELECT_24MHZ_RO_DIV_8:
mbed_official 507:d4fc7603a669 55 SystemCoreClock = 3000000;
mbed_official 507:d4fc7603a669 56 break;
mbed_official 507:d4fc7603a669 57 case MXC_E_CLKMAN_SYSTEM_SOURCE_SELECT_24MHZ_RO:
mbed_official 507:d4fc7603a669 58 case MXC_E_CLKMAN_SYSTEM_SOURCE_SELECT_PLL_48MHZ_DIV_2:
mbed_official 507:d4fc7603a669 59 SystemCoreClock = 24000000;
mbed_official 507:d4fc7603a669 60 break;
mbed_official 507:d4fc7603a669 61 case MXC_E_CLKMAN_SYSTEM_SOURCE_SELECT_HFX:
mbed_official 507:d4fc7603a669 62 SystemCoreClock = __SYSTEM_HFX;
mbed_official 507:d4fc7603a669 63 break;
mbed_official 507:d4fc7603a669 64 }
mbed_official 507:d4fc7603a669 65
mbed_official 507:d4fc7603a669 66 uint32_t shift = MXC_CLKMAN->clk_ctrl_0_system;
mbed_official 507:d4fc7603a669 67 if (shift) {
mbed_official 507:d4fc7603a669 68 SystemCoreClock = SystemCoreClock >> (shift - 1);
mbed_official 507:d4fc7603a669 69 }
mbed_official 507:d4fc7603a669 70 }
mbed_official 507:d4fc7603a669 71
mbed_official 507:d4fc7603a669 72 /* power seq registers */
mbed_official 507:d4fc7603a669 73 static void set_pwr_regs(void)
mbed_official 507:d4fc7603a669 74 {
mbed_official 507:d4fc7603a669 75 uint32_t dac2trim = MXC_DAC2->reg & 0xff00ffff;
mbed_official 507:d4fc7603a669 76 uint32_t dac3trim = MXC_DAC3->reg & 0xff00ffff;
mbed_official 507:d4fc7603a669 77 dac2trim = dac2trim + MXC_TRIM->trim_reg_36;
mbed_official 507:d4fc7603a669 78 dac3trim = dac3trim + MXC_TRIM->trim_reg_37;
mbed_official 507:d4fc7603a669 79 MXC_PWRSEQ->reg5 = MXC_TRIM->trim_reg_13;
mbed_official 507:d4fc7603a669 80 MXC_PWRSEQ->reg6 = MXC_TRIM->trim_reg_14;
mbed_official 507:d4fc7603a669 81 MXC_DAC0->trm = MXC_TRIM->trim_reg_34;
mbed_official 507:d4fc7603a669 82 MXC_DAC1->trm = MXC_TRIM->trim_reg_35;
mbed_official 507:d4fc7603a669 83 MXC_DAC2->reg = dac2trim;
mbed_official 507:d4fc7603a669 84 MXC_DAC3->reg = dac3trim;
mbed_official 507:d4fc7603a669 85 }
mbed_official 507:d4fc7603a669 86
mbed_official 507:d4fc7603a669 87 void ICC_Enable(void)
mbed_official 507:d4fc7603a669 88 {
mbed_official 507:d4fc7603a669 89 /* clock gater must be 'on' not 'dynamic' for cache control */
mbed_official 507:d4fc7603a669 90 uint32_t temp = MXC_CLKMAN->clk_gate_ctrl0;
mbed_official 507:d4fc7603a669 91 temp &= ~MXC_F_CLKMAN_CLK_GATE_CTRL0_ICACHE_CLK_GATER;
mbed_official 507:d4fc7603a669 92 temp |= (MXC_E_CLKMAN_CLK_GATE_ON << MXC_F_CLKMAN_CLK_GATE_CTRL0_ICACHE_CLK_GATER_POS);
mbed_official 507:d4fc7603a669 93 MXC_CLKMAN->clk_gate_ctrl0 = temp;
mbed_official 507:d4fc7603a669 94
mbed_official 507:d4fc7603a669 95
mbed_official 507:d4fc7603a669 96 /* invalidate, wait, enable */
mbed_official 507:d4fc7603a669 97 MXC_ICC->invdt_all = 0xFFFF;
mbed_official 507:d4fc7603a669 98 while(!(MXC_ICC->ctrl_stat & MXC_F_ICC_CTRL_STAT_READY));
mbed_official 507:d4fc7603a669 99 MXC_ICC->ctrl_stat |= MXC_F_ICC_CTRL_STAT_ENABLE;
mbed_official 507:d4fc7603a669 100
mbed_official 507:d4fc7603a669 101 /* must invalidate a second time for proper use */
mbed_official 507:d4fc7603a669 102 MXC_ICC->invdt_all = 1;
mbed_official 507:d4fc7603a669 103
mbed_official 507:d4fc7603a669 104 /* clock gater 'dynamic' safe again */
mbed_official 507:d4fc7603a669 105 temp = MXC_CLKMAN->clk_gate_ctrl0;
mbed_official 507:d4fc7603a669 106 temp &= ~MXC_F_CLKMAN_CLK_GATE_CTRL0_ICACHE_CLK_GATER;
mbed_official 507:d4fc7603a669 107 temp |= (MXC_E_CLKMAN_CLK_GATE_DYNAMIC << MXC_F_CLKMAN_CLK_GATE_CTRL0_ICACHE_CLK_GATER_POS);
mbed_official 507:d4fc7603a669 108 MXC_CLKMAN->clk_gate_ctrl0 = temp;
mbed_official 507:d4fc7603a669 109 }
mbed_official 507:d4fc7603a669 110
mbed_official 507:d4fc7603a669 111 // This function to be implemented by the hal
mbed_official 515:7467ef1f4ad8 112 extern void low_level_init(void);
mbed_official 507:d4fc7603a669 113
mbed_official 507:d4fc7603a669 114 void SystemInit(void)
mbed_official 507:d4fc7603a669 115 {
mbed_official 507:d4fc7603a669 116 set_pwr_regs();
mbed_official 507:d4fc7603a669 117
mbed_official 507:d4fc7603a669 118 // Turn off PADX
mbed_official 507:d4fc7603a669 119 MXC_IOMAN->padx_control = 0x00000441;
mbed_official 507:d4fc7603a669 120
mbed_official 538:3c6246291cdb 121 // Enable instruction cache
mbed_official 507:d4fc7603a669 122 ICC_Enable();
mbed_official 507:d4fc7603a669 123
mbed_official 507:d4fc7603a669 124 low_level_init();
mbed_official 507:d4fc7603a669 125
mbed_official 507:d4fc7603a669 126 // Clear IO Active
mbed_official 507:d4fc7603a669 127 MXC_PWRMAN->pwr_rst_ctrl = (MXC_F_PWRMAN_PWR_RST_CTRL_FLASH_ACTIVE |
mbed_official 507:d4fc7603a669 128 MXC_F_PWRMAN_PWR_RST_CTRL_SRAM_ACTIVE);
mbed_official 507:d4fc7603a669 129
mbed_official 507:d4fc7603a669 130 // Set WUD Clear
mbed_official 507:d4fc7603a669 131 MXC_PWRMAN->pwr_rst_ctrl = (MXC_F_PWRMAN_PWR_RST_CTRL_FLASH_ACTIVE |
mbed_official 507:d4fc7603a669 132 MXC_F_PWRMAN_PWR_RST_CTRL_SRAM_ACTIVE |
mbed_official 507:d4fc7603a669 133 MXC_F_PWRMAN_PWR_RST_CTRL_WUD_CLEAR);
mbed_official 507:d4fc7603a669 134
mbed_official 507:d4fc7603a669 135 // Set IO Active
mbed_official 507:d4fc7603a669 136 MXC_PWRMAN->pwr_rst_ctrl = (MXC_F_PWRMAN_PWR_RST_CTRL_FLASH_ACTIVE |
mbed_official 507:d4fc7603a669 137 MXC_F_PWRMAN_PWR_RST_CTRL_SRAM_ACTIVE |
mbed_official 507:d4fc7603a669 138 MXC_F_PWRMAN_PWR_RST_CTRL_IO_ACTIVE |
mbed_official 507:d4fc7603a669 139 MXC_F_PWRMAN_PWR_RST_CTRL_PULLUPS_ENABLED);
mbed_official 507:d4fc7603a669 140
mbed_official 538:3c6246291cdb 141 // Clear the first boot flag. Use low_level_init() if special handling is required.
mbed_official 538:3c6246291cdb 142 MXC_PWRSEQ->reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_FIRST_BOOT;
mbed_official 538:3c6246291cdb 143
mbed_official 538:3c6246291cdb 144 // Enable the regulator
mbed_official 507:d4fc7603a669 145 MXC_PWRSEQ->reg0 |= MXC_F_PWRSEQ_REG0_PWR_CHZYEN_RUN;
mbed_official 507:d4fc7603a669 146
mbed_official 538:3c6246291cdb 147 // Mask all wakeups
mbed_official 538:3c6246291cdb 148 MXC_PWRSEQ->msk_flags = 0xFFFFFFFF;
mbed_official 538:3c6246291cdb 149
mbed_official 538:3c6246291cdb 150 // Set systick to the RTC input 32.768kHz clock, not system clock; this is needed to keep JTAG alive during sleep
mbed_official 507:d4fc7603a669 151 MXC_CLKMAN->clk_ctrl |= MXC_F_CLKMAN_CLK_CTRL_RTOS_MODE;
mbed_official 507:d4fc7603a669 152
mbed_official 507:d4fc7603a669 153 SystemCoreClockUpdate();
mbed_official 507:d4fc7603a669 154 }