diff options
author | Birte Kristina Friesel <derf@finalrewind.org> | 2024-01-27 18:58:25 +0100 |
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committer | Birte Kristina Friesel <derf@finalrewind.org> | 2024-01-27 18:58:25 +0100 |
commit | b452e3f54fa46579182bc5e5fb993347e182d5a1 (patch) | |
tree | ad14461de22643e13d2fd1a2f05236c76aac02bd | |
parent | 7f98f3fd0d3c0f67cf77370f5480c43681424630 (diff) |
MSP430FR5969: Add driver for UART output on eUSCI_A1 (stdout1)
-rw-r--r-- | include/arch/msp430fr5969lp/driver/stdout1.h | 24 | ||||
-rw-r--r-- | src/arch/msp430fr5969lp/Kconfig | 10 | ||||
-rw-r--r-- | src/arch/msp430fr5969lp/Makefile.inc | 8 | ||||
-rw-r--r-- | src/arch/msp430fr5969lp/driver/stdout1.cc | 64 |
4 files changed, 103 insertions, 3 deletions
diff --git a/include/arch/msp430fr5969lp/driver/stdout1.h b/include/arch/msp430fr5969lp/driver/stdout1.h new file mode 100644 index 0000000..baf5dc7 --- /dev/null +++ b/include/arch/msp430fr5969lp/driver/stdout1.h @@ -0,0 +1,24 @@ +/* + * Copyright 2020 Birte Kristina Friesel + * + * SPDX-License-Identifier: BSD-2-Clause + */ +#ifndef STANDARDOUTPUT1_H +#define STANDARDOUTPUT1_H + +#include "object/outputstream.h" + +class StandardOutput1 : public OutputStream { + private: + StandardOutput1(const StandardOutput1 ©); + + public: + StandardOutput1 () {} + void setup(); + + virtual void put(char c) override; +}; + +extern StandardOutput1 kout1; + +#endif diff --git a/src/arch/msp430fr5969lp/Kconfig b/src/arch/msp430fr5969lp/Kconfig index 2f0f441..b96a032 100644 --- a/src/arch/msp430fr5969lp/Kconfig +++ b/src/arch/msp430fr5969lp/Kconfig @@ -27,8 +27,16 @@ config arch_msp430fr5969lp_driver_spi bool "SPI on eUSCI_B0" select meta_driver_spi +config arch_msp430fr5969lp_driver_stdout1 +bool "UART Output on eUSCI_A1 / P2.5" +help + TX: P2.5 (eUSCI_A1 / UCA1TXD) +select meta_driver_stdout1 + config arch_msp430fr5969lp_driver_stdin -bool "UART Input" +bool "UART Input on eUSCI_A0 / P2.1" +help + RX: P2.1 (eUSCI_A0 / UCA0RXD) select meta_driver_stdin config arch_msp430fr5969lp_driver_timer diff --git a/src/arch/msp430fr5969lp/Makefile.inc b/src/arch/msp430fr5969lp/Makefile.inc index 583a95a..0412516 100644 --- a/src/arch/msp430fr5969lp/Makefile.inc +++ b/src/arch/msp430fr5969lp/Makefile.inc @@ -75,8 +75,12 @@ ifdef CONFIG_arch_msp430fr5969lp_driver_adc CXX_TARGETS += src/arch/msp430fr5969lp/driver/adc.cc endif -ifdef CONFIG_arch_msp430fr5969lp_driver_dmx - CXX_TARGETS += src/arch/msp430fr5969lp/driver/dmx.cc +ifdef CONFIG_arch_msp430fr5969lp_driver_dmx1 + CXX_TARGETS += src/arch/msp430fr5969lp/driver/dmx1.cc +endif + +ifdef CONFIG_arch_msp430fr5969lp_driver_stdout1 + CXX_TARGETS += src/arch/msp430fr5969lp/driver/stdout1.cc endif ifdef CONFIG_arch_msp430fr5969lp_driver_stdin diff --git a/src/arch/msp430fr5969lp/driver/stdout1.cc b/src/arch/msp430fr5969lp/driver/stdout1.cc new file mode 100644 index 0000000..576eec0 --- /dev/null +++ b/src/arch/msp430fr5969lp/driver/stdout1.cc @@ -0,0 +1,64 @@ +/* + * Copyright 2020 Birte Kristina Friesel + * + * SPDX-License-Identifier: BSD-2-Clause + */ +#include "driver/stdout1.h" +#include <msp430.h> + +/* + * Baud rate calculation according to datasheet: + * N := f_{BRCLK} / Baudrate = F_CPU / 115200 in our case + * if N <= 16: OS16 = 0, UCBR0 = int(N) + * if N > 16: OS16 = 1, UCBR0 = int(N/16), UCBRF0 = int(((n/16) - int(n/16)) * 16) = int(N)%16 + * Set UCBRS0 according to table 21-4 + */ + +void StandardOutput1::setup() +{ + UCA1CTLW0 |= UCSWRST; +#if F_CPU == 16000000UL + // 16M / 115200 == 138.88889 -> UCOS16 = 1, UCBR0 = 16, UCBRF0 = 10, UCBRS0 = 0xf7 ("0.8751") + UCA1CTLW0 = UCSWRST | UCSSEL__SMCLK; + UCA1MCTLW = UCOS16 | (10<<4) | 0xF700; + UCA1BR0 = 8; +#elif F_CPU == 8000000UL + // 8M / 115200 == 69.444444 -> UCOS16 = 1, UCBR0 = 4, UCBRF0 = 5, UCBRS0 = 0x55 ("0.4378") + UCA1CTLW0 = UCSWRST | UCSSEL__SMCLK; + UCA1MCTLW = UCOS16 | (5<<4) | 0x5500; + UCA1BR0 = 4; +#elif F_CPU == 4000000UL + // 4M / 115200 == 34.722222 -> UCOS16 = 1, UCBR0 = 2, UCBRF0 = 2, UCBRS0 = 0xbb ("0.7147") + UCA1CTLW0 = UCSWRST | UCSSEL__SMCLK; + UCA1MCTLW = UCOS16 | (2<<4) | 0xbb00; + UCA1BR0 = 2; +#elif F_CPU == 1000000UL + // 1M / 115200 == 8.6805556 -> UCOS16 = 0, UCBR0 = 8, UCBRF0 = 0, UCBRS0 = 0xd6 ("0.6667") + UCA1CTLW0 = UCSWRST | UCSSEL__SMCLK; + UCA1MCTLW = 0x5500; + UCA1BR0 = 8; +#else +#error Unsupported F_CPU +#endif + + UCA1IRCTL = 0; + UCA1ABCTL = 0; + + P2SEL0 &= ~BIT5; + P2SEL1 |= BIT5; + P2DIR |= BIT5; + + UCA1CTLW0 &= ~UCSWRST; +} + +void StandardOutput1::put(char c) +{ + while (!(UCA1IFG & UCTXIFG)); + UCA1TXBUF = c; + + if (c == '\n') { + put('\r'); + } +} + +StandardOutput1 kout1; |