diff --git a/cpu/stm32/periph/eth.c b/cpu/stm32/periph/eth.c index 27b394b91a..608fbdab30 100644 --- a/cpu/stm32/periph/eth.c +++ b/cpu/stm32/periph/eth.c @@ -91,6 +91,7 @@ mutex_t stm32_eth_tx_completed = MUTEX_INIT_LOCKED; static edma_desc_t rx_desc[ETH_RX_DESCRIPTOR_COUNT]; static edma_desc_t tx_desc[ETH_TX_DESCRIPTOR_COUNT]; static edma_desc_t *rx_curr; +static edma_desc_t *tx_curr; /* RX Buffers */ static char rx_buffer[ETH_RX_DESCRIPTOR_COUNT][ETH_RX_BUFFER_SIZE]; @@ -178,9 +179,10 @@ static void _init_buffer(void) tx_desc[ETH_RX_DESCRIPTOR_COUNT - 1].desc_next = &tx_desc[0]; rx_curr = &rx_desc[0]; + tx_curr = &tx_desc[0]; ETH->DMARDLAR = (uintptr_t)rx_curr; - ETH->DMATDLAR = (uintptr_t)&tx_desc[0]; + ETH->DMATDLAR = (uintptr_t)tx_curr; } static int stm32_eth_set(netdev_t *dev, netopt_t opt, @@ -343,8 +345,8 @@ static int stm32_eth_send(netdev_t *netdev, const struct iolist *iolist) assert(iolist_count(iolist) <= ETH_TX_DESCRIPTOR_COUNT); for (unsigned i = 0; iolist; iolist = iolist->iol_next, i++) { - tx_desc[i].control = iolist->iol_len; - tx_desc[i].buffer_addr = iolist->iol_base; + tx_curr->control = iolist->iol_len; + tx_curr->buffer_addr = iolist->iol_base; uint32_t status = TX_DESC_STAT_IC | TX_DESC_STAT_TCH | TX_DESC_STAT_CIC | TX_DESC_STAT_OWN; if (!i) { @@ -353,9 +355,10 @@ static int stm32_eth_send(netdev_t *netdev, const struct iolist *iolist) } if (!iolist->iol_next) { /* last chunk */ - status |= TX_DESC_STAT_LS | TX_DESC_STAT_TER; + status |= TX_DESC_STAT_LS; } - tx_desc[i].status = status; + tx_curr->status = status; + tx_curr = tx_curr->desc_next; } /* start TX */