Tx only does not work

dma_gpio2/src/software_uart/debug.rs

@@ -0,0 +1,43 @@
+// src/software_uart/debug.rs
+use defmt::info;
+
+pub fn dump_tim6_regs() {
+    use embassy_stm32::pac::timer::TimBasic;
+    let tim = unsafe { TimBasic::from_ptr(0x4000_1000usize as _) };
+    let sr = tim.sr().read();
+    let dier = tim.dier().read();
+    let cr1 = tim.cr1().read();
+    let arr = tim.arr().read().arr();
+    let psc = tim.psc().read();
+    info!(
+        "TIM6: CR1.CEN={} DIER.UDE={} SR.UIF={} PSC={} ARR={}",
+        cr1.cen(),
+        dier.ude(),
+        sr.uif(),
+        psc,
+        arr
+    );
+}
+
+pub fn dump_dma_ch0_regs() {
+    use embassy_stm32::pac::gpdma::Gpdma;
+    let dma = unsafe { Gpdma::from_ptr(0x4002_0000usize as _) };
+    let ch = dma.ch(0);
+    let cr = ch.cr().read();
+    let tr1 = ch.tr1().read();
+    let tr2 = ch.tr2().read();
+    let br1 = ch.br1().read();
+    info!(
+        "GPDMA1_CH0: EN={} PRIO={} SDW={} DDW={} SINC={} DINC={} REQSEL={} SWREQ={} DREQ={} BNDT={}",
+        cr.en(),
+        cr.prio(),
+        tr1.sdw(),
+        tr1.ddw(),
+        tr1.sinc(),
+        tr1.dinc(),
+        tr2.reqsel(),
+        tr2.swreq(),
+        tr2.dreq(),
+        br1.bndt()
+    );
+}