mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_Maxim/TARGET_MAX32620C/mxc/clkman.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
186:707f6e361f3e 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Anna Bridge 186:707f6e361f3e 1 /*******************************************************************************
Anna Bridge 186:707f6e361f3e 2 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
Anna Bridge 186:707f6e361f3e 3 *
Anna Bridge 186:707f6e361f3e 4 * Permission is hereby granted, free of charge, to any person obtaining a
Anna Bridge 186:707f6e361f3e 5 * copy of this software and associated documentation files (the "Software"),
Anna Bridge 186:707f6e361f3e 6 * to deal in the Software without restriction, including without limitation
Anna Bridge 186:707f6e361f3e 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
Anna Bridge 186:707f6e361f3e 8 * and/or sell copies of the Software, and to permit persons to whom the
Anna Bridge 186:707f6e361f3e 9 * Software is furnished to do so, subject to the following conditions:
Anna Bridge 186:707f6e361f3e 10 *
Anna Bridge 186:707f6e361f3e 11 * The above copyright notice and this permission notice shall be included
Anna Bridge 186:707f6e361f3e 12 * in all copies or substantial portions of the Software.
Anna Bridge 186:707f6e361f3e 13 *
Anna Bridge 186:707f6e361f3e 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
Anna Bridge 186:707f6e361f3e 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
Anna Bridge 186:707f6e361f3e 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
Anna Bridge 186:707f6e361f3e 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
Anna Bridge 186:707f6e361f3e 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
Anna Bridge 186:707f6e361f3e 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
Anna Bridge 186:707f6e361f3e 20 * OTHER DEALINGS IN THE SOFTWARE.
Anna Bridge 186:707f6e361f3e 21 *
Anna Bridge 186:707f6e361f3e 22 * Except as contained in this notice, the name of Maxim Integrated
Anna Bridge 186:707f6e361f3e 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
Anna Bridge 186:707f6e361f3e 24 * Products, Inc. Branding Policy.
Anna Bridge 186:707f6e361f3e 25 *
Anna Bridge 186:707f6e361f3e 26 * The mere transfer of this software does not imply any licenses
Anna Bridge 186:707f6e361f3e 27 * of trade secrets, proprietary technology, copyrights, patents,
Anna Bridge 186:707f6e361f3e 28 * trademarks, maskwork rights, or any other form of intellectual
Anna Bridge 186:707f6e361f3e 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
Anna Bridge 186:707f6e361f3e 30 * ownership rights.
Anna Bridge 186:707f6e361f3e 31 *
Anna Bridge 186:707f6e361f3e 32 * $Date: 2016-02-23 15:00:38 -0600 (Tue, 23 Feb 2016) $
Anna Bridge 186:707f6e361f3e 33 * $Revision: 21448 $
Anna Bridge 186:707f6e361f3e 34 *
Anna Bridge 186:707f6e361f3e 35 ******************************************************************************/
Anna Bridge 186:707f6e361f3e 36 #include "mxc_config.h"
Anna Bridge 186:707f6e361f3e 37 #include "mxc_assert.h"
Anna Bridge 186:707f6e361f3e 38 #include "clkman.h"
Anna Bridge 186:707f6e361f3e 39 #include "pwrseq_regs.h"
Anna Bridge 186:707f6e361f3e 40
Anna Bridge 186:707f6e361f3e 41 /******************************************************************************/
Anna Bridge 186:707f6e361f3e 42 void CLKMAN_SetSystemClock(clkman_system_source_select_t select, clkman_system_scale_t scale)
Anna Bridge 186:707f6e361f3e 43 {
Anna Bridge 186:707f6e361f3e 44 MXC_CLKMAN->clk_ctrl = ((MXC_CLKMAN->clk_ctrl & ~MXC_F_CLKMAN_CLK_CTRL_SYSTEM_SOURCE_SELECT) |
Anna Bridge 186:707f6e361f3e 45 (MXC_V_CLKMAN_CLK_CTRL_SYSTEM_SOURCE_SELECT_96MHZ_RO));
Anna Bridge 186:707f6e361f3e 46
Anna Bridge 186:707f6e361f3e 47 switch(select) {
Anna Bridge 186:707f6e361f3e 48 case CLKMAN_SYSTEM_SOURCE_96MHZ:
Anna Bridge 186:707f6e361f3e 49 default:
Anna Bridge 186:707f6e361f3e 50 // Enable and select the 96MHz oscillator
Anna Bridge 186:707f6e361f3e 51 MXC_PWRSEQ->reg0 |= (MXC_F_PWRSEQ_REG0_PWR_ROEN_RUN);
Anna Bridge 186:707f6e361f3e 52 MXC_PWRSEQ->reg0 &= ~(MXC_F_PWRSEQ_REG0_PWR_OSC_SELECT);
Anna Bridge 186:707f6e361f3e 53
Anna Bridge 186:707f6e361f3e 54 // Disable the 4MHz oscillator
Anna Bridge 186:707f6e361f3e 55 MXC_PWRSEQ->reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_RCEN_RUN;
Anna Bridge 186:707f6e361f3e 56
Anna Bridge 186:707f6e361f3e 57 // Divide the system clock by the scale
Anna Bridge 186:707f6e361f3e 58 MXC_PWRSEQ->reg3 = ((MXC_PWRSEQ->reg3 & ~MXC_F_PWRSEQ_REG3_PWR_RO_DIV) |
Anna Bridge 186:707f6e361f3e 59 (scale << MXC_F_PWRSEQ_REG3_PWR_RO_DIV_POS));
Anna Bridge 186:707f6e361f3e 60
Anna Bridge 186:707f6e361f3e 61 break;
Anna Bridge 186:707f6e361f3e 62 case CLKMAN_SYSTEM_SOURCE_4MHZ:
Anna Bridge 186:707f6e361f3e 63 // Enable and select the 4MHz oscillator
Anna Bridge 186:707f6e361f3e 64 MXC_PWRSEQ->reg0 |= (MXC_F_PWRSEQ_REG0_PWR_RCEN_RUN);
Anna Bridge 186:707f6e361f3e 65 MXC_PWRSEQ->reg0 |= (MXC_F_PWRSEQ_REG0_PWR_OSC_SELECT);
Anna Bridge 186:707f6e361f3e 66
Anna Bridge 186:707f6e361f3e 67 // Disable the 96MHz oscillator
Anna Bridge 186:707f6e361f3e 68 MXC_PWRSEQ->reg0 &= ~MXC_F_PWRSEQ_REG0_PWR_ROEN_RUN;
Anna Bridge 186:707f6e361f3e 69
Anna Bridge 186:707f6e361f3e 70 // 4MHz System source can only be divided down by a maximum factor of 8
Anna Bridge 186:707f6e361f3e 71 MXC_ASSERT(scale <= CLKMAN_SYSTEM_SCALE_DIV_8);
Anna Bridge 186:707f6e361f3e 72
Anna Bridge 186:707f6e361f3e 73 // Divide the system clock by the scale
Anna Bridge 186:707f6e361f3e 74 MXC_PWRSEQ->reg3 = ((MXC_PWRSEQ->reg3 & ~MXC_F_PWRSEQ_REG3_PWR_RC_DIV) |
Anna Bridge 186:707f6e361f3e 75 (scale << MXC_F_PWRSEQ_REG3_PWR_RC_DIV_POS));
Anna Bridge 186:707f6e361f3e 76 break;
Anna Bridge 186:707f6e361f3e 77 }
Anna Bridge 186:707f6e361f3e 78
Anna Bridge 186:707f6e361f3e 79 SystemCoreClockUpdate();
Anna Bridge 186:707f6e361f3e 80 }
Anna Bridge 186:707f6e361f3e 81
Anna Bridge 186:707f6e361f3e 82 /******************************************************************************/
Anna Bridge 186:707f6e361f3e 83 void CLKMAN_CryptoClockEnable(int enable)
Anna Bridge 186:707f6e361f3e 84 {
Anna Bridge 186:707f6e361f3e 85 if (enable) {
Anna Bridge 186:707f6e361f3e 86 /* Enable oscillator */
Anna Bridge 186:707f6e361f3e 87 MXC_CLKMAN->clk_config |= MXC_F_CLKMAN_CLK_CONFIG_CRYPTO_ENABLE;
Anna Bridge 186:707f6e361f3e 88 /* Un-gate clock to TPU modules */
Anna Bridge 186:707f6e361f3e 89 MXC_CLKMAN->clk_ctrl |= MXC_F_CLKMAN_CLK_CTRL_CRYPTO_CLOCK_ENABLE;
Anna Bridge 186:707f6e361f3e 90 } else {
Anna Bridge 186:707f6e361f3e 91 /* Gate clock off */
Anna Bridge 186:707f6e361f3e 92 MXC_CLKMAN->clk_ctrl &= ~MXC_F_CLKMAN_CLK_CTRL_CRYPTO_CLOCK_ENABLE;
Anna Bridge 186:707f6e361f3e 93 /* Disable oscillator */
Anna Bridge 186:707f6e361f3e 94 MXC_CLKMAN->clk_config &= ~MXC_F_CLKMAN_CLK_CONFIG_CRYPTO_ENABLE;
Anna Bridge 186:707f6e361f3e 95 }
Anna Bridge 186:707f6e361f3e 96 }
Anna Bridge 186:707f6e361f3e 97
Anna Bridge 186:707f6e361f3e 98 /******************************************************************************/
Anna Bridge 186:707f6e361f3e 99 void CLKMAN_SetClkScale(clkman_clk_t clk, clkman_scale_t scale)
Anna Bridge 186:707f6e361f3e 100 {
Anna Bridge 186:707f6e361f3e 101 volatile uint32_t *clk_ctrl_reg;
Anna Bridge 186:707f6e361f3e 102
Anna Bridge 186:707f6e361f3e 103 MXC_ASSERT(clk <= CLKMAN_CLK_MAX);
Anna Bridge 186:707f6e361f3e 104 MXC_ASSERT(scale != CLKMAN_SCALE_AUTO);
Anna Bridge 186:707f6e361f3e 105
Anna Bridge 186:707f6e361f3e 106 if (clk < CLKMAN_CRYPTO_CLK_AES) {
Anna Bridge 186:707f6e361f3e 107 clk_ctrl_reg = &MXC_CLKMAN->sys_clk_ctrl_0_cm4 + clk;
Anna Bridge 186:707f6e361f3e 108 } else {
Anna Bridge 186:707f6e361f3e 109 clk_ctrl_reg = &MXC_CLKMAN->crypt_clk_ctrl_0_aes + (clk - CLKMAN_CRYPTO_CLK_AES);
Anna Bridge 186:707f6e361f3e 110 }
Anna Bridge 186:707f6e361f3e 111
Anna Bridge 186:707f6e361f3e 112 *clk_ctrl_reg = scale;
Anna Bridge 186:707f6e361f3e 113 }
Anna Bridge 186:707f6e361f3e 114
Anna Bridge 186:707f6e361f3e 115 /******************************************************************************/
Anna Bridge 186:707f6e361f3e 116 clkman_scale_t CLKMAN_GetClkScale(clkman_clk_t clk)
Anna Bridge 186:707f6e361f3e 117 {
Anna Bridge 186:707f6e361f3e 118 volatile uint32_t *clk_ctrl_reg;
Anna Bridge 186:707f6e361f3e 119 MXC_ASSERT(clk <= CLKMAN_CLK_MAX);
Anna Bridge 186:707f6e361f3e 120
Anna Bridge 186:707f6e361f3e 121 if (clk < CLKMAN_CRYPTO_CLK_AES) {
Anna Bridge 186:707f6e361f3e 122 clk_ctrl_reg = &MXC_CLKMAN->sys_clk_ctrl_0_cm4 + clk;
Anna Bridge 186:707f6e361f3e 123 } else {
Anna Bridge 186:707f6e361f3e 124 clk_ctrl_reg = &MXC_CLKMAN->crypt_clk_ctrl_0_aes + (clk - CLKMAN_CRYPTO_CLK_AES);
Anna Bridge 186:707f6e361f3e 125 }
Anna Bridge 186:707f6e361f3e 126
Anna Bridge 186:707f6e361f3e 127 return (clkman_scale_t)*clk_ctrl_reg;
Anna Bridge 186:707f6e361f3e 128 }
Anna Bridge 186:707f6e361f3e 129
Anna Bridge 186:707f6e361f3e 130 /******************************************************************************/
Anna Bridge 186:707f6e361f3e 131 void CLKMAN_ClockGate(clkman_enable_clk_t clk, int enable)
Anna Bridge 186:707f6e361f3e 132 {
Anna Bridge 186:707f6e361f3e 133 if (enable) {
Anna Bridge 186:707f6e361f3e 134 MXC_CLKMAN->clk_ctrl |= clk;
Anna Bridge 186:707f6e361f3e 135 } else {
Anna Bridge 186:707f6e361f3e 136 MXC_CLKMAN->clk_ctrl &= ~clk;
Anna Bridge 186:707f6e361f3e 137 }
Anna Bridge 186:707f6e361f3e 138 }
Anna Bridge 186:707f6e361f3e 139
Anna Bridge 186:707f6e361f3e 140 /******************************************************************************/
Anna Bridge 186:707f6e361f3e 141 int CLKMAN_WdtClkSelect(unsigned int idx, clkman_wdt_clk_select_t select)
Anna Bridge 186:707f6e361f3e 142 {
Anna Bridge 186:707f6e361f3e 143 MXC_ASSERT(idx < MXC_CFG_WDT_INSTANCES);
Anna Bridge 186:707f6e361f3e 144
Anna Bridge 186:707f6e361f3e 145 if (select == CLKMAN_WDT_SELECT_DISABLED) {
Anna Bridge 186:707f6e361f3e 146 if (idx == 0) {
Anna Bridge 186:707f6e361f3e 147 MXC_CLKMAN->clk_ctrl &= ~MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_ENABLE;
Anna Bridge 186:707f6e361f3e 148 } else if (idx == 1) {
Anna Bridge 186:707f6e361f3e 149 MXC_CLKMAN->clk_ctrl &= ~MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_ENABLE;
Anna Bridge 186:707f6e361f3e 150 } else {
Anna Bridge 186:707f6e361f3e 151 return E_BAD_PARAM;
Anna Bridge 186:707f6e361f3e 152 }
Anna Bridge 186:707f6e361f3e 153 } else {
Anna Bridge 186:707f6e361f3e 154 if (idx == 0) {
Anna Bridge 186:707f6e361f3e 155 MXC_CLKMAN->clk_ctrl = (MXC_CLKMAN->clk_ctrl & ~MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_SELECT) |
Anna Bridge 186:707f6e361f3e 156 MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_ENABLE |
Anna Bridge 186:707f6e361f3e 157 ((select << MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_SELECT_POS) & MXC_F_CLKMAN_CLK_CTRL_WDT0_CLOCK_SELECT);
Anna Bridge 186:707f6e361f3e 158 } else if (idx == 1) {
Anna Bridge 186:707f6e361f3e 159 MXC_CLKMAN->clk_ctrl = (MXC_CLKMAN->clk_ctrl & ~MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_SELECT) |
Anna Bridge 186:707f6e361f3e 160 MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_ENABLE |
Anna Bridge 186:707f6e361f3e 161 ((select << MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_SELECT_POS) & MXC_F_CLKMAN_CLK_CTRL_WDT1_CLOCK_SELECT);
Anna Bridge 186:707f6e361f3e 162 } else {
Anna Bridge 186:707f6e361f3e 163 return E_BAD_PARAM;
Anna Bridge 186:707f6e361f3e 164 }
Anna Bridge 186:707f6e361f3e 165 }
Anna Bridge 186:707f6e361f3e 166
Anna Bridge 186:707f6e361f3e 167 return E_NO_ERROR;
Anna Bridge 186:707f6e361f3e 168 }
Anna Bridge 186:707f6e361f3e 169
Anna Bridge 186:707f6e361f3e 170 /******************************************************************************/
Anna Bridge 186:707f6e361f3e 171 /* NOTE: CLKMAN_TrimRO() is implemented in system_max32XXX.c */
Anna Bridge 186:707f6e361f3e 172 /******************************************************************************/