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-rw-r--r--lib/rcc.c212
1 files changed, 212 insertions, 0 deletions
diff --git a/lib/rcc.c b/lib/rcc.c
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+++ b/lib/rcc.c
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+/*
+ * This file is part of the libopenstm32 project.
+ *
+ * Copyright (C) 2009 Federico Ruiz-Ugalde <memeruiz at gmail dot com>
+ * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "libopenstm32.h"
+
+void rcc_osc_ready_int_clear(osc_t osc)
+{
+ switch (osc) {
+ case PLL:
+ RCC_CR |= PLLRDYC;
+ break;
+ case HSE:
+ RCC_CR |= HSERDYC;
+ break;
+ case HSI:
+ RCC_CR |= HSIRDYC;
+ break;
+ case LSE:
+ RCC_CIR |= LSERDYC;
+ break;
+ case LSI:
+ RCC_CIR |= LSIRDYC;
+ break;
+ }
+}
+
+void rcc_osc_ready_int_enable(osc_t osc)
+{
+ switch (osc) {
+ case PLL:
+ RCC_CR |= PLLRDYIE;
+ break;
+ case HSE:
+ RCC_CR |= HSERDYIE;
+ break;
+ case HSI:
+ RCC_CR |= HSIRDYIE;
+ break;
+ case LSE:
+ RCC_CIR |= LSERDYIE;
+ break;
+ case LSI:
+ RCC_CIR |= LSIRDYIE;
+ break;
+ }
+}
+
+void rcc_osc_ready_int_disable(osc_t osc)
+{
+ switch (osc) {
+ case PLL:
+ RCC_CR &= ~PLLRDYIE;
+ break;
+ case HSE:
+ RCC_CR &= ~HSERDYIE;
+ break;
+ case HSI:
+ RCC_CR &= ~HSIRDYIE;
+ break;
+ case LSE:
+ RCC_CIR &= ~LSERDYIE;
+ break;
+ case LSI:
+ RCC_CIR &= ~LSIRDYIE;
+ break;
+ }
+}
+
+int rcc_osc_ready_int_flag(osc_t osc)
+{
+ switch (osc) {
+ case PLL:
+ return ((RCC_CR & PLLRDYF) != 0);
+ break;
+ case HSE:
+ return ((RCC_CR & HSERDYF) != 0);
+ break;
+ case HSI:
+ return ((RCC_CR & HSIRDYF) != 0);
+ break;
+ case LSE:
+ return ((RCC_CIR & LSERDYF) != 0);
+ break;
+ case LSI:
+ return ((RCC_CIR & LSIRDYF) != 0);
+ break;
+ }
+}
+
+void rcc_css_int_clear(void)
+{
+ RCC_CIR |= CSSC;
+}
+
+int rcc_css_int_flag(void)
+{
+ return ((RCC_CIR & CSSF) != 0);
+}
+
+int rcc_osc_ready(osc_t osc)
+{
+ switch (osc) {
+ case PLL:
+ return ((RCC_CR & PLLRDY) != 0);
+ break;
+ case HSE:
+ return ((RCC_CR & HSERDY) != 0);
+ break;
+ case HSI:
+ return ((RCC_CR & HSIRDY) != 0);
+ break;
+ case LSE:
+ return ((RCC_BDCR & LSERDY) != 0);
+ break;
+ case LSI:
+ return ((RCC_CSR & LSIRDY) != 0);
+ break;
+ }
+}
+
+void rcc_osc_on(osc_t osc)
+{
+ switch (osc) {
+ case PLL:
+ RCC_CR |= PLLON;
+ break;
+ case HSE:
+ RCC_CR |= HSEON;
+ break;
+ case HSI:
+ RCC_CR |= HSION;
+ break;
+ case LSE:
+ RCC_BDCR |= LSEON;
+ break;
+ case LSI:
+ RCC_CSR |= LSION;
+ break;
+ }
+}
+
+void rcc_osc_off(osc_t osc)
+{
+ switch (osc) {
+ case PLL:
+ RCC_CR &= ~PLLON;
+ break;
+ case HSE:
+ RCC_CR &= ~HSEON;
+ break;
+ case HSI:
+ RCC_CR &= ~HSION;
+ break;
+ case LSE:
+ RCC_BDCR &= ~LSEON;
+ break;
+ case LSI:
+ RCC_CSR &= ~LSION;
+ break;
+ }
+}
+
+void rcc_css_enable(void)
+{
+ RCC_CR |= CSSON;
+}
+
+void rcc_css_disable(void)
+{
+ RCC_CR &= ~CSSON;
+}
+
+void rcc_osc_bypass_enable(osc_t osc)
+{
+ switch (osc) {
+ case HSE:
+ RCC_CR |= HSEBYP;
+ break;
+ case LSE:
+ RCC_BDCR |= LSEBYP;
+ break;
+ }
+}
+
+void rcc_osc_bypass_disable(osc_t osc)
+{
+ switch (osc) {
+ case HSE:
+ RCC_CR &= ~HSEBYP;
+ break;
+ case LSE:
+ RCC_BDCR &= ~LSEBYP;
+ break;
+ }
+}