Add finish_dma function

2021-12-14 16:59:31 -06:00
parent a13a7a6616
commit 6597e67036
4 changed files with 33 additions and 81 deletions
--- a/embassy-stm32/src/spi/mod.rs
+++ b/embassy-stm32/src/spi/mod.rs
@ -451,6 +451,27 @@ fn spin_until_idle(regs: Regs) {
    }
 }

+fn finish_dma(regs: Regs) {
+    spin_until_idle(regs);
+
+    unsafe {
+        regs.cr1().modify(|w| {
+            w.set_spe(false);
+        });
+
+        #[cfg(not(spi_v3))]
+        regs.cr2().modify(|reg| {
+            reg.set_txdmaen(false);
+            reg.set_rxdmaen(false);
+        });
+        #[cfg(spi_v3)]
+        regs.cfg1().modify(|reg| {
+            reg.set_txdmaen(false);
+            reg.set_rxdmaen(false);
+        });
+    }
+}
+
 trait Word {
    const WORDSIZE: WordSize;
 }