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authorDaniel Friesel <derf@finalrewind.org>2020-06-22 21:43:00 +0200
committerDaniel Friesel <derf@finalrewind.org>2020-06-22 21:43:00 +0200
commit9942173a2b46d5eb28fc41faf1627afc9929902d (patch)
tree6be86379dbb8e7684abf2b73509bd8babcb5ec4a /src/app/loratest
parent7add7f43d77b5cd398a5e824dfae5bfd89c66268 (diff)
loratest app. TODO: move SerialOutput and SerialInput to separate class
Or rather: TODO: make stdin/stdout configurable so it also works for eUSCI_A1.
Diffstat (limited to 'src/app/loratest')
-rw-r--r--src/app/loratest/Makefile.inc1
-rw-r--r--src/app/loratest/main.cc165
2 files changed, 166 insertions, 0 deletions
diff --git a/src/app/loratest/Makefile.inc b/src/app/loratest/Makefile.inc
new file mode 100644
index 0000000..2cb8a42
--- /dev/null
+++ b/src/app/loratest/Makefile.inc
@@ -0,0 +1 @@
+loop ?= 1
diff --git a/src/app/loratest/main.cc b/src/app/loratest/main.cc
new file mode 100644
index 0000000..5b03425
--- /dev/null
+++ b/src/app/loratest/main.cc
@@ -0,0 +1,165 @@
+#include "arch.h"
+#include "driver/gpio.h"
+#include "driver/stdout.h"
+
+class SerialOutput : public OutputStream {
+ private:
+ SerialOutput(const SerialOutput &copy);
+
+ public:
+ SerialOutput () {}
+ void setup();
+
+ virtual void put(char c) override;
+};
+
+/*
+ * 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 SerialOutput::setup()
+{
+ UCA1CTLW0 |= UCSWRST;
+#if F_CPU == 16000000UL
+ // 16M / 9600 == 1666.6667 -> UCOS16 = 1, UCBR0 = 104, UCBRF0 = 2, UCBRS0 = 0xd6 ("0.6667")
+ UCA1CTLW0 = UCSWRST | UCSSEL__SMCLK;
+ UCA1MCTLW = UCOS16 | (2<<4) | 0xd600;
+ UCA1BR0 = 104;
+#elif F_CPU == 8000000UL
+ // 8M / 9600 == 833.3333 -> UCOS16 = 1, UCBR0 = 52, UCBRF0 = 1, UCBRS0 = 0x49 ("0.3335")
+ UCA1CTLW0 = UCSWRST | UCSSEL__SMCLK;
+ UCA1MCTLW = UCOS16 | (1<<4) | 0x4900;
+ UCA1BR0 = 52;
+#else
+#error Unsupported F_CPU
+#endif
+
+ UCA1IRCTL = 0;
+ UCA1ABCTL = 0;
+
+ P2REN &= ~(BIT5 | BIT6);
+ P2SEL0 &= ~(BIT5 | BIT6);
+ P2SEL1 |= BIT5 | BIT6;
+
+ UCA1CTLW0 &= ~UCSWRST;
+
+ //UCA1IE |= UCRXIE;
+}
+
+void SerialOutput::put(char c)
+{
+ while (!(UCA1IFG & UCTXIFG));
+ UCA1TXBUF = c;
+
+ if (c == '\n') {
+ put('\r');
+ }
+}
+
+SerialOutput sout;
+
+class SerialInput {
+ private:
+ SerialInput(const SerialInput &copy);
+ char buffer[64];
+ unsigned char write_pos, read_pos;
+
+ public:
+ SerialInput() : write_pos(0), read_pos(0) {}
+ void setup();
+ bool hasKey();
+ char getKey();
+
+ inline void addKey(char key) {
+ buffer[write_pos++] = key;
+ write_pos %= 64;
+ }
+};
+
+void SerialInput::setup()
+{
+ UCA1IE |= UCRXIE;
+}
+
+bool SerialInput::hasKey()
+{
+ if (write_pos != read_pos) {
+ return true;
+ }
+ return false;
+}
+
+char SerialInput::getKey()
+{
+ char ret = buffer[read_pos++];
+ read_pos %= 64;
+ return ret;
+}
+
+SerialInput sin;
+
+__attribute__((interrupt(USCI_A1_VECTOR))) __attribute__((wakeup)) void handle_stdin()
+{
+ if (UCA1IFG & UCRXIFG) {
+ sin.addKey(UCA1RXBUF);
+ }
+}
+
+void loop(void)
+{
+ static unsigned int i = 0;
+ gpio.led_off(0);
+ // does not work on MSP430 3V3
+ // works when connected to MSP430 5V0, AUX should be disconnected in that case
+ // RX seems to work best without intermittent TX
+ sout << "Hello! My value is " << i << endl;
+ if (sin.hasKey()) {
+ gpio.led_on(0);
+ kout << "RX: ";
+ while (sin.hasKey()) {
+ kout << sin.getKey();
+ }
+ kout << endl;
+ }
+ i++;
+}
+
+int main(void)
+{
+ arch.setup();
+ gpio.setup();
+ kout.setup();
+ sout.setup();
+ sin.setup();
+
+ gpio.led_on(1);
+
+ // AUX
+ gpio.input(GPIO::p4_2);
+
+ // set module to sleep mode
+
+ // M0
+ gpio.output(GPIO::p2_4, 1);
+
+ // M1
+ gpio.output(GPIO::p4_3, 1);
+
+ arch.delay_ms(100);
+ sout << "\xc2\x00\x00\x1a\x17\x47";
+ arch.delay_ms(50);
+ gpio.write(GPIO::p2_4, 0);
+ gpio.write(GPIO::p4_3, 0);
+ arch.delay_ms(10);
+
+ gpio.led_off(1);
+ gpio.led_on(0);
+
+ arch.idle_loop();
+
+ return 0;
+}